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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=21108 java.util.ConcurrentModificationException occurs in iterator Summary: java.util.ConcurrentModificationException occurs in iterator Product: Struts Version: 1.1 Beta 3 Platform: PC OS/Version: Linux Status: NEW Severity: Major Priority: Other Component: Custom Tags AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] This is a sporadic issue that does not happen consistently. I can reload the page and the error won't be there on the reload. I get the following error using an iterator tag: [ERROR,Engine] ApplicationDispatcher[/rlms] Servlet.service() for servlet jsp threw exception java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:444) at java.util.AbstractList$Itr.next(AbstractList.java:421) at org.apache.struts.taglib.logic.IterateTag.doAfterBody(IterateTag.java:420) at org.apache.jsp.createLabKitBody$jsp._jspService(createLabKitBody$jsp.java:1120) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:683) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497) at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:118) at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:161) at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:703) at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:818) at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:467) at org.apache.jsp.rlmsLayout$jsp._jspService(rlmsLayout$jsp.java:155) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:683) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497) at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:118) at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:161) at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:703) at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:818) at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:467) at org.apache.jsp.createLabKitExt$jsp._jspService(createLabKitExt$jsp.java:78) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:683) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:431) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:355) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1033) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:269) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:436) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:312) at org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:401) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027) at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125) at java.lang.Thread.run(Thread.java:536) --------------------------------------------------------------------- To 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