[JBoss JIRA] Created: (JBRULES-1009) Can't execute rules twice with a second classloader
by aaron dixon (JIRA)
Can't execute rules twice with a second classloader
---------------------------------------------------
Key: JBRULES-1009
URL: http://jira.jboss.com/jira/browse/JBRULES-1009
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Reteoo
Affects Versions: 4.0.0.MR3
Reporter: aaron dixon
Assigned To: Mark Proctor
Priority: Minor
Attachments: drools-test.zip
I am trying to sequentially perform two rules executions using two
different classloaders in the same VM. I create completely new state
for each execution, yet I still fail on the second execution (the first execution succeeds). I
believe this has to do with some internal static cached state that
JBossRules is maintaining. An integration test is attached as an archived Eclipse project (zip).
Exception thrown:
Exception in thread "main" java.lang.ClassCastException: test.drools.classloader.FooShadowProxy
at org.drools.base.test.drools.classloader.Foo$getName.getValue(Unknown Source)
at org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:94)
at org.drools.base.evaluators.StringFactory$StringEqualEvaluator.evaluate(StringFactory.java:85)
at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:61)
at org.drools.rule.LiteralConstraint.isAllowed(LiteralConstraint.java:82)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:772)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:584)
at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:63)
at test.drools.classloader.Driver.testRules(Driver.java:49)
at test.drools.classloader.Driver.go(Driver.java:35)
at test.drools.classloader.Driver.main(Driver.java:19)
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12 years, 1 month
[JBoss JIRA] Created: (JBRULES-946) RuleBase serialization fails with StackOverflowError
by Alexandre Gattiker (JIRA)
RuleBase serialization fails with StackOverflowError
----------------------------------------------------
Key: JBRULES-946
URL: http://jira.jboss.com/jira/browse/JBRULES-946
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 4.0.0.MR2
Reporter: Alexandre Gattiker
Assigned To: Mark Proctor
I created 920 rules, all in this format, with different values in the string literals.
rule "Rule_1"
when
$g:Parent()
$c:Child(parent==$g,code=="yyy1")
Item(parentObject==$c,name=="xxx1", value == "1")
Item(parentObject==$c,name=="xxx2",value == "1")
Item(parentObject==$g,name=="xxx3",value == "200")
then
System.out.println("2");
end
With the following code, I create a RuleBase that I serialize.
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
PackageBuilderConfiguration conf = new PackageBuilderConfiguration();
conf.setCompiler(PackageBuilderConfiguration.JANINO);
Reader source = new InputStreamReader(PolicyServiceImpl.class.getResourceAsStream(fileName));
PackageBuilder builder = new PackageBuilder(conf);
builder.addPackageFromDrl(source);
Package pkg = builder.getPackage();
ruleBase.addPackage(pkg);
//serialize RuleBase
File outFile = new File(f.getPath() + ".tmp");
FileOutputStream fout = new FileOutputStream(outFile);
ObjectOutputStream oos = new ObjectOutputStream(fout);
oos.writeObject(ruleBase);
oos.close();
The serialization fails with the following exception. Otherwise the RuleBase is perfectly fine and working.
java.lang.StackOverflowError
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream$BlockDataOutputStream.write(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java(Compiled Code))
at java.util.ArrayList.writeObject(ArrayList.java(Compiled Code))
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java(Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java(Inlined Compiled Code))
at java.util.ArrayList.writeObject(ArrayList.java(Compiled Code))
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java(Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java(Inlined Compiled Code))
at java.util.ArrayList.writeObject(ArrayList.java(Compiled Code))
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java(Compiled Code))
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java(Compiled Code))
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java(Inlined Compiled Code))
(last four lines repeated over 1000 times)
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12 years, 2 months
[JBoss JIRA] Created: (JGRP-364) When using TCP_NIO, starting two nodes at the same time causes one of the nodes not to join group
by Matthew Todd (JIRA)
When using TCP_NIO, starting two nodes at the same time causes one of the nodes not to join group
-------------------------------------------------------------------------------------------------
Key: JGRP-364
URL: http://jira.jboss.com/jira/browse/JGRP-364
Project: JGroups
Issue Type: Bug
Affects Versions: 2.4
Environment: linux 2.6 kernel x86_64 running java 1.5.0_06
Reporter: Matthew Todd
Assigned To: Bela Ban
I am testing a jgroups tcp_nio configuration using the draw demo.If I start up my 3 nodes one by one then everything works fine. However if I start up node 1, then attempt to start node 2 and 3 in parallel then only node 2 will work. Node 3 will be isolated and not see the other nodes and logs the following message:
org.jgroups.protocols.pbcast.ClientGmsImpl join
WARNING: join(192.158.70.200:7802) sent to 192.158.70.200:7800 timed out, retrying
I am starting the draw demo like this;
java -cp jgroups-all.jar:commons-logging.jar:concurrent.jar:jmxri.jar org.jgroups.demos.Draw -props test.xml
Here is the configuration for one of my nodes:
<config>
<TCP_NIO
bind_addr="192.158.70.200"
recv_buf_size="20000000"
send_buf_size="640000"
loopback="false"
discard_incompatible_packets="true"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
use_outgoing_packet_handler="true"
down_thread="false" up_thread="false"
enable_bundling="true"
start_port="7800"
end_port="7800"
use_send_queues="false"
sock_conn_timeout="300" skip_suspected_members="true"
/>
<MPING timeout="2000" num_initial_members="3" mcast_addr="229.6.7.8"
bind_addr="192.158.70.200" down_thread="false" up_thread="false"/>
<MERGE2 max_interval="100000"
down_thread="false" up_thread="false" min_interval="20000"/>
<FD_SOCK down_thread="false" up_thread="false"/>
<VERIFY_SUSPECT timeout="1500" down_thread="false" up_thread="false"/>
<pbcast.NAKACK max_xmit_size="60000"
use_mcast_xmit="false" gc_lag="0"
retransmit_timeout="300,600,1200,2400,4800"
down_thread="true" up_thread="true"
discard_delivered_msgs="true"/>
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
down_thread="false" up_thread="false"
max_bytes="400000"/>
<pbcast.GMS print_local_addr="true" join_timeout="3000"
down_thread="true" up_thread="true"
join_retry_timeout="2000" shun="true"
view_bundling="true"/>
<!-- <FC max_credits="2000000" down_thread="false" up_thread="false"
min_threshold="0.10"/>
<FRAG2 frag_size="60000" down_thread="false" up_thread="false"/> -->
<pbcast.STATE_TRANSFER/>
<!-- <pbcast.FLUSH down_thread="false" up_thread="false"/>-->
</config>
Node 2 and 3 have the same configuration except the port they bind to has been changed
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12 years, 4 months
[JBoss JIRA] Created: (JGRP-356) TCP_NIO: failure starting correctly with bundling enabled
by Bela Ban (JIRA)
TCP_NIO: failure starting correctly with bundling enabled
---------------------------------------------------------
Key: JGRP-356
URL: http://jira.jboss.com/jira/browse/JGRP-356
Project: JGroups
Issue Type: Bug
Affects Versions: 2.4
Reporter: Bela Ban
Assigned To: Vladimir Blagojevic
Fix For: 2.5
Stack is (default tcp-nio.xml with bundling enabled), the error is:
$ jg Draw -props ./tcp-nio.xml
-------------------------------------------------------
GMS: address is 127.0.0.1:7800
-------------------------------------------------------
** View=[127.0.0.1:7800|0] [127.0.0.1:7800]
0 [WARN] [TimeScheduler.Thread] TimeScheduler._run(): task org.jgroups.protocols.TP$Bundler$BundlingTimer@1c65216 took 20921ms to execute, please check why it is taking so long. It is delaying other tasks
<config>
<TCP_NIO
recv_buf_size="20000000"
send_buf_size="640000"
loopback="false"
discard_incompatible_packets="true"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
use_outgoing_packet_handler="false"
down_thread="false" up_thread="false"
enable_bundling="true"
start_port="7800"
use_send_queues="false"
sock_conn_timeout="300" skip_suspected_members="true"
reader_threads="8"
writer_threads="8"
processor_threads="8"
processor_minThreads="8"
processor_maxThreads="8"
processor_queueSize="100"
processor_keepAliveTime="-1"/>
<TCPPING timeout="3000"
down_thread="false" up_thread="false"
initial_hosts="${jgroups.tcpping.initial_hosts:localhost[7800],localhost[7801]}"
port_range="1"
num_initial_members="3"/>
<MERGE2 max_interval="100000"
down_thread="false" up_thread="false" min_interval="20000"/>
<FD_SOCK down_thread="false" up_thread="false"/>
<FD timeout="10000" max_tries="5" down_thread="false" up_thread="false" shun="true"/>
<VERIFY_SUSPECT timeout="1500" down_thread="false" up_thread="false"/>
<pbcast.NAKACK max_xmit_size="60000"
use_mcast_xmit="false" gc_lag="0"
retransmit_timeout="300,600,1200,2400,4800"
down_thread="false" up_thread="false"
discard_delivered_msgs="true"/>
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
down_thread="false" up_thread="false"
max_bytes="400000"/>
<pbcast.GMS print_local_addr="true" join_timeout="3000"
down_thread="false" up_thread="false"
join_retry_timeout="2000" shun="true"
view_bundling="true"/>
<FC max_credits="2000000" down_thread="false" up_thread="false"
min_threshold="0.10"/>
<FRAG2 frag_size="60000" down_thread="false" up_thread="false"/>
<pbcast.STREAMING_STATE_TRANSFER down_thread="false" up_thread="false"
use_flush="true" use_reading_thread="true"/>
<!-- pbcast.STATE_TRANSFER down_thread="false" up_thread="false" use_flush="false"/ -->
<pbcast.FLUSH down_thread="false" up_thread="false"/>
</config>
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12 years, 4 months
[JBoss JIRA] Created: (JGRP-346) Connection objects are removed from the ConnectionTable, but remain active on the system and eventually consume available system resources.
by Stuart Jensen (JIRA)
Connection objects are removed from the ConnectionTable, but remain active on the system and eventually consume available system resources.
-------------------------------------------------------------------------------------------------------------------------------------------
Key: JGRP-346
URL: http://jira.jboss.com/jira/browse/JGRP-346
Project: JGroups
Issue Type: Bug
Affects Versions: 2.3 SP1
Environment: SUSE Linux 9
Reporter: Stuart Jensen
Assigned To: Bela Ban
To duplicate the issue:
1) Create a four member cluster using the following configuration: (two member clusters exhibit the problem as well, just not as exaggerated)
TCP(start_port=7801):
TCPPING(initial_hosts=<ip addresses go here>;port_range=3;timeout=3500;num_initial_members=3;up_thread=true;down_thread=true):
MERGE2(min_interval=5000;max_interval=10000):
FD(shun=true;timeout=2500;max_tries=5;up_thread=true;down_thread=true):
VERIFY_SUSPECT(timeout=2000;down_thread=false;up_thread=false):
pbcast.NAKACK(down_thread=true;up_thread=true;gc_lag=100;retransmit_timeout=3000):
pbcast.STABLE(desired_avg_gossip=20000;down_thread=false;up_thread=false):
pbcast.GMS(join_timeout=5000;join_retry_timeout=3500;shun=true;print_local_addr=true;down_thread=true;up_thread=true)
2) I was running JGroups in a Tomcat servlet application. Start up the cluster. To determine the number of threads on Linux I executed the following commands:
ps -ef | grep tomcat
echo "" > catalina.out
kill -QUIT <pid from ps command above>
grep ".Sender \[" catalina.out | wc -l
You get the process id of Tomcat using the ps command. Then clear the content of the catalina.out file. The kill command causes the threads to be printed into the catalina.out file. Then the grep searches for and counts all of the "ConnectionTable.Connnection.Sender" threads that are currently active on the system.
3) Pick one of the cluster member boxes and pull the network cable out of the box such that all communication with the other three members is terminated.
4) After one or two minutes, replace the network cable.
5) Repeat the steps to determine the number of threads currently active on the system.
6) Repeat steps 3 through 5, each time watching the number of threads. Each iteration will cause more and more threads to be orphaned on the system. It seems to grow exponentially, after about 4 iterations we have around 300-400 Sender threads. The Receiver threads will be orphaned also in similar numbers.
After investigating the issue, I came up with the following "fix" which cleared the problem up.
In the file ConnectionTable.java there is a method called retainAll(). It appears that this method is called by the TCP protocol when a view change occurs. This method removes Connnections from the "Connection Pool" (member variable conns) but does not destroy them. We initially thought the reaper thread may clean them up, but since the Connection objects are actually removed from the Connection Pool, the reaper does not help the situation. As we watched our connections we noticed that the Connections orphaned by this routine were the ones filling up the system's set of threads. So, we added code to call destroy() on all of the Connection objects that retainAll() removes from the Connection Pool. The "diff" is provided below. Note that we did our change in the JGroups 2.3 SP1 file ConnectionTable.java. Scott Marlow did this diff for me, the same change, but applied to the BasicConnectionTable from the 2.4 source set.
Index: BasicConnectionTable.java
===================================================================
RCS file: /cvsroot/javagroups/JGroups/src/org/jgroups/blocks/BasicConnectionTable.java,v
retrieving revision 1.8
diff -r1.8 BasicConnectionTable.java
22,26c22
< import java.util.Map;
< import java.util.Iterator;
< import java.util.HashMap;
< import java.util.Vector;
< import java.util.Collection;
---
> import java.util.*;
263c259,289
< conns.keySet().retainAll(c);
---
> // conns.keySet().retainAll(c);
> ArrayList alConnsToDestroy = new ArrayList();
> synchronized(conns)
> {
> HashMap copy=new HashMap(conns);
> conns.keySet().retainAll(c);
> Set ks = copy.keySet();
> Iterator iter = ks.iterator();
> while (iter.hasNext())
> {
> Object oKey = iter.next();
> if (null == conns.get(oKey))
> { // This connection NOT in the resultant connection set
> Connection conn = (Connection)copy.get(oKey);
> if (null != conn)
> { // Destroy this connection
> alConnsToDestroy.add(conn);
> }
> }
> }
> }
> // All of the connections that were not retained must be destroyed
> // so that their resources are cleaned up.
> for (int a=0; a<alConnsToDestroy.size(); a++)
> {
> Connection conn = (Connection)alConnsToDestroy.get(a);
> if(log.isTraceEnabled())
> log.trace("Destroy this orphaned connection: " + conn);
> conn.destroy();
> }
>
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12 years, 4 months
[JBoss JIRA] Created: (JGRP-371) TCP_NIO with SSL
by Bela Ban (JIRA)
TCP_NIO with SSL
----------------
Key: JGRP-371
URL: http://jira.jboss.com/jira/browse/JGRP-371
Project: JGroups
Issue Type: Feature Request
Affects Versions: 2.4
Reporter: Bela Ban
Assigned To: Bela Ban
Fix For: 2.5
Attachments: ssl-nio.jar
>From Hal Hildebrand:
Attached are the sources to allow a new protocol stack which uses SSL over
NIO. This protocol stack element provides security and authentication
(using client side authentication) for a JGroups TCP stack using NIO.
This required two minor modifications in the ConnectionTableNIO class.
These modifications allow one to subclass to create a connection table which
uses SSL for the connections. Finally, there is a new protocol stack
element, SSL_NIO, which one can add to a stack to make use of it.
Regardless of whether this makes it into the codeline of JGroups, it would
be nice to have the changes to ConnectionTableNIO make it into the mainline,
as I currently have to overwrite the original class to easily implement this
- the last thing I want to do is fork ConnectionTableNIO ;) I'd rather just
subclass it. The mods are simple and innocuous (marked with "HSH").
Right now, the SSL_NIO needs to be configured with an SSLSocketFactory. I
didn't bother with integrating with the normal JGroups mechanism using
properties from the configuration because I consider it inherently insecure
to ensconce my passwords in configuration files. But the changes to enable
this are straight forward. Currently, to configure the factory for the
protocol layer, do something like the following before connecting your
channel:
// Construct your Jchannel
JChannel jchannel = ...
// Access your protocol stack
ProtocolStack protocolStack = jchannel.getProtocolStack();
// Retrieve the SSL_NIO protocol layer
SSL_NIO protocol = (SSL_NIO) protocolStack.findProtocol("SSL_NIO");
// Create your SSLSocketFactory
SSLSocketFactory socketFactory = ....
// Set up the protocol
protocol. SetSocketFactory(socketFactory);
// Connect your channel
jchannel.connnect("my-group");
Cheers.
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12 years, 4 months
[JBoss JIRA] Created: (HIBERNATE-54) problems w/ column names beginning with '_' (underscore) w/ apache derby database
by bugra uytun (JIRA)
problems w/ column names beginning with '_' (underscore) w/ apache derby database
---------------------------------------------------------------------------------
Key: HIBERNATE-54
URL: http://jira.jboss.com/jira/browse/HIBERNATE-54
Project: Hibernate
Issue Type: Bug
Environment: windows xp, java 1.5.0_09, eclispe 3.2.1, hibernate 3.2.1, derby 10.2.2.0, hibernate tools 3.2 beta8
Reporter: bugra uytun
Assigned To: Steve Ebersole
derby has problems with column names beginning with underscore, see also http://db.apache.org/derby/docs/10.1/ref/crefsqlj1003454.html
therefore such column names should be between double quotation marks (notice that double quotation marks also sets the case sensitivity on column names.)
but hibernate translates a HQL statement like this "from table1 t where t.id = '1'" to something like:
select table1_.id as id4, table1_._colname1 as column27_4_ schema1.table1 table1_ where table1_.id = '1'
but because of the columns that are beginning with an underscore the translation should be:
select table1_."id" as id4, table1_."_colname1" as column27_4_ schema1."table1" table1_ where table1_."id" = '1'
the errors i got are:
DEBUG [JDBCExceptionReporter]: could not execute query [<translated sql statement>]
ERROR 42X01: Syntax error: Encountered "_" at line 1, column 987.
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.impl.sql.compile.ParserImpl.parseStatement(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
at org.apache.derby.jdbc.Driver30.newEmbedPreparedStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:497)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:415)
at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1538)
at org.hibernate.loader.Loader.doQuery(Loader.java:661)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2211)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
at org.hibernate.loader.Loader.list(Loader.java:2090)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:388)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at <mypackage>.MyHibernate.main(MyHibernate.java:13)
WARN main org.hibernate.util.JDBCExceptionReporter - SQL Error: 20000, SQLState: 42X01
ERROR main org.hibernate.util.JDBCExceptionReporter - Syntax error: Encountered "_" at line 1, column 987.
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12 years, 7 months