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From "Lukasz Lenart (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (WW-3019) ConcurrentModificationException using s:iterator (intermittent)
Date Fri, 11 Apr 2014 11:29:15 GMT

     [ https://issues.apache.org/jira/browse/WW-3019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lukasz Lenart updated WW-3019:
------------------------------

    Fix Version/s:     (was: 2.3.18)
                   2.5.x

> ConcurrentModificationException using s:iterator (intermittent)
> ---------------------------------------------------------------
>
>                 Key: WW-3019
>                 URL: https://issues.apache.org/jira/browse/WW-3019
>             Project: Struts 2
>          Issue Type: Bug
>    Affects Versions: 2.1.6
>         Environment: OS:
> Linux  2.6.18-92.1.13.el5 #1 SMP Wed Sep 24 19:33:52 EDT 2008 i686 i686 i386 GNU/Linux
> Glassfish:
> Version = Sun Java System Application Server 9.1_02
>            Reporter: Chris Dunphy
>             Fix For: 2.5.x
>
>         Attachments: layout_wait.jsp, struts.xml, tiles.xml, viewrequest.jsp, wait.jsp
>
>
> I have an intermittent problem using the s:iterator tag with the waitAndExec interceptor.
 Here is the file that I am trying to insert into the tiles layout (viewrequest.jsp):
> {code:xml}
> <%@ taglib prefix="s" uri="/struts-tags"%>
> <s:if test="empeRequest.messages.size() > 0">
> 	<div class="box" style="background-color: #CCCCCC">
> 	<h3><s:property value="empeRequest.description" /></h3>
> 	<ul>
> 		<s:iterator value="empeRequest.messages">
> 			<s:if test="status.toString() == 'NORMAL'">
> 				<li style="background-color: #CCFFCC"><s:property
> 					value="message" /></li>
> 			</s:if>
> 			<s:elseif test="status.toString() == 'WARNING'">
> 				<li style="background-color: #FFFFCC"><s:property
> 					value="message" /></li>
> 			</s:elseif>
> 			<s:elseif test="status.toString() == 'ERROR'">
> 				<li style="background-color: #FFBBBB"><s:property
> 					value="message" /></li>
> 			</s:elseif>
> 		</s:iterator>
> 	</ul>
> 	</div>
> </s:if>
> {code}
> This is the layout page I am including the above file in (waitlayout.jsp):
> {code:xml}
> <%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles"%>
> <%@ taglib prefix="s" uri="/struts-tags"%>
> <?xml version="1.0" encoding="utf-8"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
> 	<head>
> 		<meta http-equiv="refresh" content="5;url=<s:url includeParams="all" />" />
> 		<title>${application.title}</title>
> 		<style type="text/css">@import url( css/empe.css );</style>
> 	</head>
> <body>
> 	<div class="force-scrollbar">&nbsp;</div>
> 	<div class="main">
> 		<div class="content">
> 			<tiles:insertAttribute name="body" />
> 			<tiles:insertAttribute name="viewRequest" />
> 		</div>
> 	</div>
> </body>
> </html>
> {code}
> This sometimes crashses with the following stack trace:
> {noformat}
> Caused by: java.util.ConcurrentModificationException
>         at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
>         at java.util.AbstractList$Itr.next(AbstractList.java:343)
>         at org.apache.struts2.components.IteratorComponent.end(IteratorComponent.java:266)
>         at org.apache.struts2.views.jsp.IteratorTag.doAfterBody(IteratorTag.java:69)
>         at org.apache.jsp.jsp.fragments.viewrequest_jsp._jspx_meth_s_iterator_0(viewrequest_jsp.java
from :177)
>         at org.apache.jsp.jsp.fragments.viewrequest_jsp._jspx_meth_s_if_0(viewrequest_jsp.java
from :108)
>         at org.apache.jsp.jsp.fragments.viewrequest_jsp._jspService(viewrequest_jsp.java
from :67)
>         at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:93)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
>         at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
>         at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:470)
>         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:364)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
>         at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
>         at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:855)
>         at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:703)
>         at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:660)
>         at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:578)
>         at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:997)
>         at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:682)
>         at org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:103)
>         ... 112 more
> {noformat}
> This doesn't happen consistently, but every third or forth run, which is enough to cause
problems for users.  I don't suspect it is a tiles issue, but appears to be an issue with
iterator based on the stack trace.



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