[JBoss JIRA] Created: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
6:41 p.m.
Remoting configured with Servlet invoker can return misleading Exceptions when Servlet
path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA, 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Galder Zamarreno
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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12:03 a.m.
New subject: [JBoss JIRA] Updated: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Ron Sigal updated JBREM-960:
----------------------------
Fix Version/s: 2.2.2.SP8
Assignee: Ron Sigal (was: Galder Zamarreno)
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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-
If you think it was sent incorrectly contact one of the administrators:
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12:09 a.m.
New subject: [JBoss JIRA] Commented: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=comments#action_12417484 ]
Ron Sigal commented on JBREM-960:
---------------------------------
I wasn't able to reproduce the exception given above, but by messing up the Naming
configuration I was able to get:
Exception in thread "main" javax.naming.ServiceUnavailableException: Unexpected
failure [Root exception is org.jboss.remoting.CannotConnectException: Can not connect http
client invoker. invalid stream header. Response: Internal Server Error/500.]
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:71)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.jboss.tutorial.http_https.client.Client.calculate(Client.java:56)
at org.jboss.tutorial.http_https.client.Client.main(Client.java:41)
Caused by: org.jboss.remoting.CannotConnectException: Can not connect http client
invoker. invalid stream header. Response: Internal Server Error/500.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:350)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:139)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at
org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:57)
... 9 more
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:753)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:268)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:518)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:309)
... 17 more
I made two changes in HTTPClientInvoker:
1. When HTTPClientInvoker.readResponse() experiences an exception, it tests for an end of
file condition:
catch (IOException e)
{
if (-1 == is.read())
{
throw new EOFException();
}
throw e;
}
and, in the event of an end of file, throws EOFException, which is somewhat better
than java.io.StreamCorruptedException: invalid stream header.
2. When HTTPClientInvoker.useHttpURLConnection() catches an exception, it tries to add a
response message and response code to the message in the CannotConnectException it
throws:
catch (Exception e)
{
String message = "Can not connect http client invoker.";
if (e.getMessage() != null)
message += " " + e.getMessage() + ".";
try
{
String responseMessage = conn.getResponseMessage();
int code = conn.getResponseCode();
message += " Response: " + responseMessage + "/" + code +
".";
}
catch (IOException e1)
{
log.debug("Unable to retrieve response message", e1);
}
throw new CannotConnectException(message, e);
}
With those changes, the stracktrace becomes
Exception in thread "main" javax.naming.ServiceUnavailableException: Unexpected
failure [Root exception is org.jboss.remoting.CannotConnectException: Can not connect http
client invoker. Response: Internal Server Error/500.]
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:71)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.jboss.tutorial.http_https.client.Client.calculate(Client.java:56)
at org.jboss.tutorial.http_https.client.Client.main(Client.java:41)
Caused by: org.jboss.remoting.CannotConnectException: Can not connect http client
invoker. Response: Internal Server Error/500.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:350)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:139)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at
org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:57)
... 9 more
Caused by: java.io.EOFException
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:530)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:309)
... 17 more
[Actually, it looks like I had already added the response message/code when I got the
first stack trace].
I think this looks a lot better. I'm sure it would be possible to do something more
sophisticated by looking at response codes, but then I'd probably have to worry about
different behaviors from different servers.
Galdor, does this look OK to you? Do you want to try it with your original exception?
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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12:21 a.m.
New subject: [JBoss JIRA] Updated: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Ron Sigal updated JBREM-960:
----------------------------
Attachment: jboss-remoting.jar
I've attached a copy of jboss-remoting.jar with the related changes. It will identify
itself as
2.2.2.SP8-preview:JBREM-949+JBREM-954+JBREM-965+JBREM-981+JBREM-960
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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10:39 a.m.
New subject: [JBoss JIRA] Commented: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=comments#action_12417709 ]
Galder Zamarreno commented on JBREM-960:
----------------------------------------
Re: I wasn't able to reproduce the exception given above,
I'm able to replicate it very easily. Let me upload the deployment
archives and the JBDS project and let me explain what you need
to run.
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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10:41 a.m.
New subject: [JBoss JIRA] Updated: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Galder Zamarreno updated JBREM-960:
-----------------------------------
Attachment: jbrem-960-deployments.zip
Unzip this into the deploy/ folder one of the latest EAP releases,
such as EAP 4.3.0.GA_CP01
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
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10:43 a.m.
New subject: [JBoss JIRA] Updated: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Galder Zamarreno updated JBREM-960:
-----------------------------------
Attachment: jbrem-960-projects.zip
These ZIP file contains the JBDS projects used to generate
the deployment archives. Within the ejb2-beans project, run
the TimeTellerTest.testUnifiedHttpCalls test.
With the given deployments, this should fail with:
java.io.StreamCorruptedException: invalid stream header
I'll attach client and server log files in a min
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip,
jbrem-960-projects.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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10:45 a.m.
New subject: [JBoss JIRA] Updated: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Galder Zamarreno updated JBREM-960:
-----------------------------------
Attachment: jbrem-960-logs.zip
Client and server log files for the failing scenario.
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip, jbrem-960-logs.zip,
jbrem-960-projects.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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10:45 a.m.
New subject: [JBoss JIRA] Commented: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=comments#action_12417713 ]
Galder Zamarreno commented on JBREM-960:
----------------------------------------
I'm now gonna try with the attached remoting jar file and see
what I get for this test.
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip, jbrem-960-logs.zip,
jbrem-960-projects.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
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11:37 a.m.
New subject: [JBoss JIRA] Commented: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=comments#action_12417715 ]
Galder Zamarreno commented on JBREM-960:
----------------------------------------
With the attached jar, I now get:
javax.naming.ServiceUnavailableException: Unexpected failure [Root exception is
org.jboss.remoting.CannotConnectException: Can not connect http client invoker. Response:
/unified-http-invoker/ServerInvokerServlet//404.]
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:71)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:667)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at com.acme.ejb2.slsb.TimeTellerTest.testUnifiedHttpCalls(TimeTellerTest.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
Response: /unified-http-invoker/ServerInvokerServlet//404.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:350)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:139)
at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:184)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at
org.jboss.naming.interceptors.ExceptionInterceptor.invoke(ExceptionInterceptor.java:57)
... 24 more
Caused by: java.io.EOFException
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:530)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:309)
... 32 more
That's more meaningul so I'm happy with it :)
Thanks Ron!!
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip, jbrem-960-logs.zip,
jbrem-960-projects.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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1:35 a.m.
New subject: [JBoss JIRA] Closed: (JBREM-960) Remoting configured with Servlet invoker can return misleading Exceptions when Servlet path is incorrect
[ http://jira.jboss.com/jira/browse/JBREM-960?page=all ]
Ron Sigal closed JBREM-960.
---------------------------
Resolution: Done
Great! Closing the issue. Note that JBREM-990 represents this issue for Remoting 2.4.
Remoting configured with Servlet invoker can return misleading
Exceptions when Servlet path is incorrect
--------------------------------------------------------------------------------------------------------
Key: JBREM-960
URL: http://jira.jboss.com/jira/browse/JBREM-960
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: transport
Affects Versions: 2.4.0.GA (Pinto), 2.2.2.SP8, 2.4.1.Beta
Reporter: Galder Zamarreno
Assigned To: Ron Sigal
Fix For: 2.2.2.SP8
Attachments: jboss-remoting.jar, jbrem-960-deployments.zip, jbrem-960-logs.zip,
jbrem-960-projects.zip
I've been struggling to set up a ServletInvoker in Remoting to be able to
use the unified invoker to talk to EJB2 beans in AS/EAP 4.x. I had the Connector
set up like this:
<mbean code="org.jboss.remoting.transport.Connector"
name="jboss.remoting:service=connector,transport=servlet"
display-name="Servlet transport Connector">
<attribute name="Configuration">
<config>
<invoker transport="servlet">
<attribute name="dataType"
isParam="true">invocation</attribute>
<attribute name="marshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationMarshaller</attribute>
<attribute name="unmarshaller"
isParam="true">org.jboss.invocation.unified.marshall.InvocationUnMarshaller</attribute>
<attribute
name="serverBindAddress">${jboss.bind.address}</attribute>
<attribute name="serverBindPort">8080</attribute>
<attribute
name="path">unified-http-invoker/ServerInvokerServlet</attribute>
</invoker>
<handlers>
<handler
subsystem="invoker">jboss:service=invoker,type=unified-http</handler>
</handlers>
</config>
</attribute>
</mbean>
But the path attribute was incorrect. Remoting was coming back with something like this:
org.jboss.remoting.CannotConnectException: Can not connect http client invoker.
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:333)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:135)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)
at org.jboss.remoting.Client.invoke(Client.java:1634)
at org.jboss.remoting.Client.invoke(Client.java:548)
at
org.jboss.invocation.unified.interfaces.UnifiedInvokerProxy.invoke(UnifiedInvokerProxy.java:183)
at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at com.acme.ejb2.slsb.TimerEnquirerHttpTest.test000(TimerEnquirerHttpTest.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
at
org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.<init>(ObjectInputStreamWithClassLoader.java:95)
at
org.jboss.remoting.serialization.impl.java.JavaSerializationManager.createInput(JavaSerializationManager.java:54)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.getMarshallingStream(SerializableUnMarshaller.java:72)
at
org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:119)
at
org.jboss.invocation.unified.marshall.InvocationUnMarshaller.read(InvocationUnMarshaller.java:59)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.readResponse(HTTPClientInvoker.java:471)
at
org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:305)
... 31 more
Now, to get this Exception is very misleading. It generally means that either you have
different
client and server side Remoting versions, or you're using different serialization
methods on either
side.
Once I started to dig into what Remoting was doing, I spotted HTTPClientInvoker does the
following in
useHttpURLConnection() method:
if (sendingData)
{
//POST or PUT
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod(type);
OutputStream stream = conn.getOutputStream();
if (marshaller instanceof VersionedMarshaller)
((VersionedMarshaller) marshaller).write(invocation, stream,
Version.getDefaultVersion());
else
marshaller.write(invocation, stream);
responseCode = conn.getResponseCode();
InputStream is = (responseCode < 400) ? conn.getInputStream() :
conn.getErrorStream();
Map headers = conn.getHeaderFields();
if (metadata == null)
{
metadata = new HashMap();
}
// sometimes I get headers with "null" keys (I don't know
who's fault is it), so I need
// to clean the header map, unless I want to get an NPE thrown by
metadata.putAll()
if (headers != null)
{
for(Iterator i = headers.entrySet().iterator(); i.hasNext(); )
{
Map.Entry e = (Map.Entry)i.next();
if (e.getKey() != null)
{
metadata.put(e.getKey(), e.getValue());
}
}
}
metadata.put(HTTPMetadataConstants.RESPONSE_CODE_MESSAGE,
conn.getResponseMessage());
metadata.put(HTTPMetadataConstants.RESPONSE_CODE, new
Integer(responseCode));
result = readResponse(metadata, headers, unmarshaller, is);
}
The Exception reported is coming from readResponse() but before that if the Servlet was
not available,
like in my case, conn.getResponseCode() was returning 404.
Remoting code should check what the response code was, whether this is an invalid code,
i.e. does not exist...etc,
and throw an Exception if invalid, like in this case, giving the caller much better clue
of what is going on.
Thoughts?
--
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-
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5793
days inactive
5869
days old
jboss-remoting-issues@lists.jboss.org
10 comments
2 participants
participants (2)
-
Galder Zamarreno (JIRA) -
Ron Sigal (JIRA)