[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2086) ConcurrentModificationException in Pages.wildcardViewIds

Fri Dec 7 17:57:51 EST 2007

    [ http://jira.jboss.com/jira/browse/JBSEAM-2086?page=comments#action_12391172 ] 

Przemyslaw Jaskierski commented on JBSEAM-2086:
-----------------------------------------------

I've just filled similar problem report, marking as dupe. But one more thing... 
Maybe thread safety is not the only one problem here. If this is the case of concurrent modification of "wildcardViewIds" the question is why it is altered long after application starts? This structure holds configuration of wildcard page patterns. Why is it changing in time when no altering of pages.xml is performed? Is it optimal? 

If this is used so often, adding synchronization here (as suggested in attached forum thread) can add some weight, too.

I get this exception during heavy load testing session, after few seconds and some successful requests, adding for your convenience:

* 2007-12-07 20:59:27,148 ERROR SeamPhaseListener.afterPhase():189
  uncaught exception
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1152)
at org.jboss.seam.navigation.Pages.createPageStack(Pages.java:233)
at org.jboss.seam.navigation.Pages.getPageStack(Pages.java:220)
at org.jboss.seam.navigation.Pages.storeRequestStringValuesInPageContext(Pages.java:706)
at org.jboss.seam.navigation.Pages.postRestore(Pages.java:364)
at org.jboss.seam.jsf.SeamPhaseListener.postRestorePage(SeamPhaseListener.java:535)
at org.jboss.seam.jsf.SeamPhaseListener.afterRestoreView(SeamPhaseListener.java:381)
at org.jboss.seam.jsf.SeamPhaseListener.afterServletPhase(SeamPhaseListener.java:218)
at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:184)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:280)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
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 org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:183)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:125)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:107)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:78)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:383)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at net.sf.ehcache.constructs.web.filter.GzipFilter.doFilter(GzipFilter.java:75)
at net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:92)
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.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)

It originates from this foreach:

233: for (String wildcard: wildcardViewIds) 

> ConcurrentModificationException in Pages.wildcardViewIds
> --------------------------------------------------------
>
>                 Key: JBSEAM-2086
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2086
>             Project: JBoss Seam
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.0.0.CR2
>            Reporter: Pete Muir
>             Fix For: 2.0.1.GA
>
>

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