3 Replies Latest reply on Sep 24, 2009 11:09 AM by peterj

maxThreads/ThreadPool configuration

njrfrens Sep 23, 2009 7:34 AM

I'm little confused with the following 2 parameters
1. <Connector port="8443" maxThreads="500" in server\default\deploy\jboss-web.deployer\server.xml

2.
JBoss System Threads
10
in \server\default\conf\jboss-service.xml

First one is referring to the max no. of HTTP threads that the server handle
How the MaximumPoolSize is related to this one?

My application has to handle 500 concurrent requests.
My application is running on a server with 2GB RAM. My JBoss version is 4.2.3.
I've used the below configuration:
1. maxThreads="500" in HTTPConnector
2. MaximumPoolSize is 10 in jboss-service.xml
3. max-pool-size = 60 in mssql-ds.xml

Is there any issue in my configuration?

When I'm running load test
With <200 users, application is running fine
Beyond 200 users, I'm getting the errors "Peer shut down incorrectly" and
"500 Internal Server error"

1. Re: maxThreads/ThreadPool configuration

peterj Sep 23, 2009 10:57 AM (in response to njrfrens)

First, there should be stack traces in the console log or in server.log that correspond to the errors you mentioned. Post one of thos stack traces.

The max-pool-size seems very low. How likely is it that an HTTP request will need a database connection? If every request needs a connection, then max-pool-size should be closer to maxThreads. Most likely what happened for the 500 error is that too many HTTP requests were waiting for a database connection and thus were turned away.
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2. Re: maxThreads/ThreadPool configuration

njrfrens Sep 24, 2009 5:17 AM (in response to njrfrens)

Thanks Peter for valuable inputs.

1. Below is the exception stack trace I'm seeing in during load test beyond the 200 users

2009-09-26 14:33:28,453 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/MedNetPortal].[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
java.lang.IllegalStateException: setAttribute: Session already invalidated
 at org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1289)
 at org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1254)
 at org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:130)
 at com.sun.faces.taglib.jsf_core.ViewTag.doEndTag(ViewTag.java:283)
 at org.apache.jsp.jsp.common.login.Login_jsp._jspx_meth_f_005fview_005f0(Login_jsp.java:202)
 at org.apache.jsp.jsp.common.login.Login_jsp._jspService(Login_jsp.java:100)
 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:373)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
 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.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
 at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:97)
 at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
 at com.hospira.mednet.portal.view.common.controller.PortalExTranFilter.doFilter(PortalExTranFilter.java:46)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:198)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
 at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
 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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
 at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
 at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:410)
 at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:473)
 at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:141)
 at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
 at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196)
 at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:109)
 at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
 at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
 at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
 at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
 at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:301)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
 at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
 at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
 at com.hospira.mednet.portal.view.common.controller.PortalExTranFilter.doFilter(PortalExTranFilter.java:46)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
 at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
 at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
 at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 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:182)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
 at java.lang.Thread.run(Thread.java:595)

2. In my application, almost 90% http requests will require a DB Connection.
I configured maxThreads="500", max-pool-size = 500

Still I could see the errors

I am running JBoss 4.2.3 on Intel Xeon CPU, E5405 @2.00 G.Hz,3.99 GB RAM

any pointers for my solution please...!

3. Re: maxThreads/ThreadPool configuration

peterj Sep 24, 2009 11:09 AM (in response to njrfrens)

1) That is a JSF-related error. I'll leave it to someone more familiar with Faces to help you with that one.

2) Make sure that your database will alllow 500 connection.
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