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Posted to users@wicket.apache.org by Thomas Götz <to...@richmountain.de> on 2011/09/14 16:44:52 UTC
java.util.ConcurrentModificationException in Component.internalPrepareForRender
Hi,
I am currently migrating an application to Wicket 1.5.0 (from Wicket 1.4.17) and experience the following error:
ERROR - DefaultExceptionMapper - Unexpected error occurred
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at org.apache.wicket.Component.internalPrepareForRender(Component.java:2191)
at org.apache.wicket.Page.internalPrepareForRender(Page.java:280)
at org.apache.wicket.Component.render(Component.java:2265)
at org.apache.wicket.Page.renderPage(Page.java:1035)
at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:105)
at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:224)
at org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:147)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:719)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
The error always occurs when requesting the first page after having started Jetty. Anyone has seen this already?!
Cheers,
-Tom
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Re: java.util.ConcurrentModificationException in Component.internalPrepareForRender
Posted by Thomas Götz <to...@richmountain.de>.
Actually not that easy, as there are 8 feedbacks in getRequestCycle().getMetaData(FEEDBACK_LIST) (Component, line 2188). But I noticed that one of them (which causes the exception) is a border (extends Border implements IFeedback) …
I will try what I can do to isolate this further.
-Tom
On 14.09.2011, 16:48 Martin Grigorov wrote:
> Can you reproduce it with a quickstart ?
>
> On Wed, Sep 14, 2011 at 5:44 PM, Thomas Götz <to...@richmountain.de> wrote:
>> Hi,
>>
>> I am currently migrating an application to Wicket 1.5.0 (from Wicket 1.4.17) and experience the following error:
>>
>> ERROR - DefaultExceptionMapper - Unexpected error occurred
>> java.util.ConcurrentModificationException
>> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
>> at java.util.AbstractList$Itr.next(AbstractList.java:343)
>> at org.apache.wicket.Component.internalPrepareForRender(Component.java:2191)
>> at org.apache.wicket.Page.internalPrepareForRender(Page.java:280)
>> at org.apache.wicket.Component.render(Component.java:2265)
>> at org.apache.wicket.Page.renderPage(Page.java:1035)
>> at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:105)
>> at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:224)
>> at org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:147)
>> at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:719)
>> at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
>> at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
>> at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
>> at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
>> at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
>> at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
>> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
>> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
>> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> at org.mortbay.jetty.Server.handle(Server.java:326)
>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
>> at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
>> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>> at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
>> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
>>
>>
>>
>> The error always occurs when requesting the first page after having started Jetty. Anyone has seen this already?!
>>
>> Cheers,
>> -Tom
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
---------------------------------------------------------------------
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Re: java.util.ConcurrentModificationException in Component.internalPrepareForRender
Posted by Martin Grigorov <mg...@apache.org>.
Can you reproduce it with a quickstart ?
On Wed, Sep 14, 2011 at 5:44 PM, Thomas Götz <to...@richmountain.de> wrote:
> Hi,
>
> I am currently migrating an application to Wicket 1.5.0 (from Wicket 1.4.17) and experience the following error:
>
> ERROR - DefaultExceptionMapper - Unexpected error occurred
> java.util.ConcurrentModificationException
> at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at org.apache.wicket.Component.internalPrepareForRender(Component.java:2191)
> at org.apache.wicket.Page.internalPrepareForRender(Page.java:280)
> at org.apache.wicket.Component.render(Component.java:2265)
> at org.apache.wicket.Page.renderPage(Page.java:1035)
> at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:105)
> at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:224)
> at org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:147)
> at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:719)
> at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
> at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)
> at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
> at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
> at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
> at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
>
>
>
> The error always occurs when requesting the first page after having started Jetty. Anyone has seen this already?!
>
> Cheers,
> -Tom
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com
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