[Remoting] - Re: JBREM-877: New Socket Connection is being Created for Ev
by ron.sigal＠jboss.com
I've added a new feature to the Remoting 2.4 branch which allows the destruction of a client invoker to be delayed by some number of microseconds. The idea is to pick a delay long enough that the client invoker will still be around to be used by the next invocation on the same server. It could be useful in a situation where there are not a lot of concurrent invocations.
The delay is turned off by default, but it can be turned on by setting the parameter Client.INVOKER_DESTRUCTION_DELAY (actual value "invokerDestructionDelay") to a positive integer. The value can be set either by
* adding "invokerDestructionDelay=xxx" to the InvokerLocator, or
* adding the value with key "invokerDestructionDelay" to the configuration map passed to the Client constructor.
For EJB3 clients, the value should be set in the Connector MBean in the file .../server/default/deploy/ejb3.deployer/META-INF/jboss-service.xml.
Just to illustrate the value of this feature, I ran the following loop:
| for (int i = 0; i < 10000; i++)
| {
| Client client = new Client(locator, config);
| client.connect();
| client.invoke("abc");
| client.disconnect();
| }
|
with and without a delay, and I got the following results:
| run delay=0 delay=5000
| -------------------------------
| 1 46937 22657
| 2 49265 24016
| 3 47750 23375
| ---------------------------------
| avg: 47989 23349
|
|
The average speed up is a factor of 2.06. This was a simple in-jvm test, with nothing else going on, but it's still interesting.
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18 years, 1 month
[Installation, Configuration & DEPLOYMENT] - Connection lost b/w jboss and MySQL...>????
by raghav8t2
Hi,
I am running JBoss 4.2.0 with MySQl 5.0. I deployed my application and started the jboss server at night and i kept jboss running till the next morning. When i accessed my appliction the next day, the connection is lost between jboss and mysql and i got this error...
i am unable to find out the where the problem is.... is it with Jboss??? or MySQL???? is there any thing that i should change in the jboss configurations to keep the connection between jboss and the databse alive.....????????
The error i got is...............
org.apache.jasper.JasperException: javax.servlet.ServletException: java.sql.SQLException: No operations allowed after connection closed.
Connection was closed due to the following exception:
** BEGIN NESTED EXCEPTION **
java.sql.SQLException
MESSAGE: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream
** BEGIN NESTED EXCEPTION **
java.io.IOException
MESSAGE: Unexpected end of input stream
STACKTRACE:
java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1405)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1775)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1020)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1109)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1563)
at org.apache.jsp.ExistTran_jsp._jspService(ExistTran_jsp.java:325)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:387)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:687)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at com.controllers.TranServlet.doGet(TranServlet.java:135)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:853)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1513)
at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
STACKTRACE:
java.sql.SQLException: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream
** BEGIN NESTED EXCEPTION **
java.io.IOException
MESSAGE: Unexpected end of input stream
STACKTRACE:
java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1405)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1775)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1020)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1109)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1563)
at org.apache.jsp.ExistTran_jsp._jspService(ExistTran_jsp.java:325)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:387)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:687)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at com.controllers.TranServlet.doGet(TranServlet.java:135)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:853)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1513)
at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1527)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1775)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1020)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1109)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1563)
at org.apache.jsp.ExistTran_jsp._jspService(ExistTran_jsp.java:325)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:387)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:687)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at com.controllers.TranServlet.doGet(TranServlet.java:135)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:853)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1513)
at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:535)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131599#4131599
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18 years, 1 month
[JCA/JBoss] - Re: Can
by vickyk
"vola" wrote : Because I am working on self-adaptive system. If too many exceptions are thrown, I hope the system can self-adapt to solve the problem by itself.
|
Theoritically there can be couple of ways which comes to my mind , but don't do it unless there is not workaround
1) Modify the InternalManagedConnectionPool , have the variable in the Counter which will should be updated here .
else
| {
| // UPDATE THE COUNTER HERE
| // we timed out
| throw new ResourceException("No ManagedConnections available within configured blocking timeout ( "
| + poolParams.blockingTimeout + " [ms] )");
| }
In the InternalManagedConnectionPool$Counter keep getFailedCount()/setFailedCount methods , these should again be exposed through the JbossManagedConnectionPool .
This is trivial change in
http://anonsvn.jboss.org/repos/jbossas/trunk/connector/src/main/org/jboss...
http://anonsvn.jboss.org/repos/jbossas/trunk/connector/src/main/org/jboss...
2) Have a Mbean which will scan the server.log file and check for the occurance of the NoManagedConnection Error .
Or you can direct the error logging to a specific log file , the Mbean will use this log file and change the setting of the Pool on the fly .
But DON't try these options , you should identify the peak load to which pool can be subjected and configure max pool size accordingly .
The pool will shrink if these connections are not used over long time which is configurable (idle-timeout-minutes) , so keeping the high value for the pool will not be the issue , the pool implementation will take care of all .
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18 years, 1 month