I get the following exception when i do some stress test with jmeter.
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
> at java.util.AbstractList$Itr.next(Unknown Source)
> at org.apache.struts2.components.IteratorComponent.end(
IteratorComponent.java:246)
> at org.apache.struts2.views.jsp.IteratorTag.doAfterBody(
IteratorTag.java:68)
> at
org.apache.jsp.jupiters2.archivo.jsp.expediente.frmPrestamo_jsp._jspx_meth_s_005fiterator_005f0
(frmPrestamo_jsp.java:1595)
> at
org.apache.jsp.jupiters2.archivo.jsp.expediente.frmPrestamo_jsp._jspx_meth_s_005fform_005f0
(frmPrestamo_jsp.java:640)
> at
org.apache.jsp.jupiters2.archivo.jsp.expediente.frmPrestamo_jsp._jspService
(frmPrestamo_jsp.java:186)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java
:98)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> at org.apache.jasper.servlet.JspServletWrapper.service(
JspServletWrapper.java:328)
> at org.apache.jasper.servlet.JspServlet.serviceJspFile(
JspServlet.java:315)
> 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:269)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(
ApplicationFilterChain.java:188)
> at org.apache.catalina.core.ApplicationDispatcher.invoke(
ApplicationDispatcher.java:691)
> 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 org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(
ServletDispatcherResult.java:139)
> at org.apache.struts2.dispatcher.StrutsResultSupport.execute(
StrutsResultSupport.java:178)
> at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(
DefaultActionInvocation.java:348)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:253)
> at
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(
DefaultWorkflowInterceptor.java:221)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(
MethodFilterInterceptor.java:86)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(
ValidationInterceptor.java:150)
> at
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept
(AnnotationValidationInterceptor.java:48)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(
MethodFilterInterceptor.java:86)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(
ConversionErrorInterceptor.java:123)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(
ParametersInterceptor.java:167)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(
MethodFilterInterceptor.java:86)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(
StaticParametersInterceptor.java:105)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(
CheckboxInterceptor.java:83)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(
FileUploadInterceptor.java:207)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(
ModelDrivenInterceptor.java:74)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(
ScopedModelDrivenInterceptor.java:127)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(
ProfilingActivationInterceptor.java:107)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(
DebuggingInterceptor.java:206)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept
(ChainingInterceptor.java:115)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(
I18nInterceptor.java:143)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(
PrepareInterceptor.java:121)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(
MethodFilterInterceptor.java:86)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept
(ServletConfigInterceptor.java:170)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(
AliasInterceptor.java:123)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(
ExceptionMappingInterceptor.java:176)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:224)
> at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(
DefaultActionInvocation.java:223)
> at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(
UtilTimerStack.java:455)
> at com.opensymphony.xwork2.DefaultActionInvocation.invoke(
DefaultActionInvocation.java:221)
> at org.apache.struts2.impl.StrutsActionProxy.execute(
StrutsActionProxy.java:50)
> at org.apache.struts2.dispatcher.Dispatcher.serviceAction(
Dispatcher.java:504)
> at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(
FilterDispatcher.java:419)
> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(
ApplicationFilterChain.java:215)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(
ApplicationFilterChain.java:188)
> at org.apache.catalina.core.StandardWrapperValve.invoke(
StandardWrapperValve.java:210)
> at org.apache.catalina.core.StandardContextValve.invoke(
StandardContextValve.java:174)
> at org.apache.catalina.core.StandardHostValve.invoke(
StandardHostValve.java:127)
> at org.apache.catalina.valves.ErrorReportValve.invoke(
ErrorReportValve.java:117)
> at org.apache.catalina.core.StandardEngineValve.invoke(
StandardEngineValve.java:108)
> at org.apache.catalina.connector.CoyoteAdapter.service(
CoyoteAdapter.java:151)
> at org.apache.coyote.http11.Http11Processor.process(
Http11Processor.java:870)
> at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection
(Http11BaseProtocol.java:665)
> at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(
PoolTcpEndpoint.java:528)
> at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(
LeaderFollowerWorkerThread.java:81)
> at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(
ThreadPool.java:685)
> at java.lang.Thread.run(Unknown Source)
> I tried with different test plans and with different number of
threads/users in my test but basically i get this exception since 50 users.
> I do the following in my test paln:
> Enter to the page
> Lookup for some data with an autocompleter
> Input another data in a textbox
> insert the previous information in a list that is a property of the action
related to the page( in my code ia have an action per page)
> The list is displayed in a <table> in my page using <s:iterator>
> Delete the item recently added to the list.
> By the way my action is in the session.
> Maybe the problem is my code, so please i want your opinion about this
situation. I have made another stress test in webapps without struts2 and i
never had this exception.
