You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@myfaces.apache.org by Döring Markus <Ma...@tcc-products.de> on 2008/05/06 09:28:56 UTC
[Trinidad] ConcurrentModification
Hi List,
I have a page that shows a <tr:table>.
This table refreshs with a <tr:poll>
<tr:poll id="tablePoll" interval="5000" />
<tr:table rows="20" value="#{tableController.scores}" var="data" id="scoreTable" partialTriggers="tablePoll">
... some columns and stuff
</tr:table>
So far everything works fine, but when I have multiple tabs open in Firefox showing the same page, I get the exception attached below.
This is not critical because it's not a use case for our application, but I'm trying to understand what happens here.
Also I've noticed that the session is the same across multiple tabs. Is there some way to get a new session for every browser tab or is this browser specific?
I'm using:
Facelets 1.1.14
MyFaces 1.1.5
Trinidad 1.0.3
JBoss 4.2.2 GS
Hope someone can have a look at this and help me understanding how everything works.
Thanks
best regards
Markus Döring
TCC Products GmbH
Von: pen@tcc-products.de [mailto:pen@tcc-products.de]
Gesendet: Montag, 5. Mai 2008 18:41
An: PEN
Betreff: DPS Error 10.6.65.9
________________________________
Log session start time Mon May 05 18:40:43 CEST 2008
Time
Thread
Level
Category
Message
6866296
http-0.0.0.0-8080-1
ERROR
facelets.viewhandler
Error Rendering View[/golf/score.xhtml]
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
at java.util.AbstractList$Itr.next(AbstractList.java:420)
at org.apache.myfaces.trinidad.component.UIXComponentBase.getFacetsAndChildren(UIXComponentBase.java:586)
at com.sun.facelets.tag.jsf.ComponentSupport.findChildByTagId(ComponentSupport.java:114)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:128)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:119)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:144)
at com.sun.facelets.tag.ui.IncludeHandler.apply(IncludeHandler.java:60)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:509)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:552)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:253)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:210)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:164)
at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at de.tccproducts.dps.web.utils.lifecycle.ExceptionFilter.doFilter(ExceptionFilter.java:40)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:595)
AW: [Trinidad] ConcurrentModification
Posted by Döring Markus <Ma...@tcc-products.de>.
Hi,
thanks so far for all the answers, helped a lot in understanding what happens in the background.
To your questions:
I have
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
In my web.xml, don't know if this is the "normal" or the Trinidad token-based state saving, who do I know which is it?
The view root cache is disabled.
Regards
Markus
-----Ursprüngliche Nachricht-----
Von: Andrew Robinson [mailto:andrew.rw.robinson@gmail.com]
Gesendet: Dienstag, 6. Mai 2008 17:56
An: MyFaces Discussion
Betreff: Re: [Trinidad] ConcurrentModification
Are you using client or server side state saving?
If client, are you using real client side state saving or Trinidad's
default fake client side state using tokens?
Do you have the trinidad cache view root setting enabled?
It looks like both windows are using the same component tree, which is
bad, I dont think that should be happening. I always turn off
Trinidad's view root caching. It is nice for perf. but can be really
bad for bugs.
On Tue, May 6, 2008 at 1:28 AM, Döring Markus
<Ma...@tcc-products.de> wrote:
>
>
>
>
> Hi List,
>
> I have a page that shows a <tr:table>.
>
> This table refreshs with a <tr:poll>
>
>
>
> <tr:poll id="tablePoll" interval="5000" />
>
>
>
> <tr:table rows="20" value="#{tableController.scores}" var="data"
> id="scoreTable" partialTriggers="tablePoll">
>
> ... some columns and stuff
>
> </tr:table>
>
>
>
> So far everything works fine, but when I have multiple tabs open in Firefox
> showing the same page, I get the exception attached below.
>
> This is not critical because it's not a use case for our application, but
> I'm trying to understand what happens here.
>
> Also I've noticed that the session is the same across multiple tabs. Is
> there some way to get a new session for every browser tab or is this browser
> specific?
>
>
>
> I'm using:
>
> Facelets 1.1.14
>
> MyFaces 1.1.5
>
> Trinidad 1.0.3
>
> JBoss 4.2.2 GS
>
>
>
> Hope someone can have a look at this and help me understanding how
> everything works.
>
> Thanks
>
>
>
> best regards
>
> Markus Döring
>
> TCC Products GmbH
>
>
>
>
>
>
>
>
>
> Von: pen@tcc-products.de [mailto:pen@tcc-products.de]
> Gesendet: Montag, 5. Mai 2008 18:41
> An: PEN
> Betreff: DPS Error 10.6.65.9
>
>
> ________________________________
>
>
> Log session start time Mon May 05 18:40:43 CEST 2008
>
>
> Time
>
> Thread
>
> Level
>
> Category
>
> Message
>
>
> 6866296
>
> http-0.0.0.0-8080-1
>
> ERROR
>
> facelets.viewhandler
>
> Error Rendering View[/golf/score.xhtml]
>
>
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
> at java.util.AbstractList$Itr.next(AbstractList.java:420)
> at
> org.apache.myfaces.trinidad.component.UIXComponentBase.getFacetsAndChildren(UIXComponentBase.java:586)
> at
> com.sun.facelets.tag.jsf.ComponentSupport.findChildByTagId(ComponentSupport.java:114)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:128)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:119)
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
> at
> com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:144)
> at
> com.sun.facelets.tag.ui.IncludeHandler.apply(IncludeHandler.java:60)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
> at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
> at
> com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:509)
> at
> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:552)
> at
> org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
> at
> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:253)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:210)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:164)
> at
> org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> de.tccproducts.dps.web.utils.lifecycle.ExceptionFilter.doFilter(ExceptionFilter.java:40)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> 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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
> at
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
> at java.lang.Thread.run(Thread.java:595)
>
>
Re: [Trinidad] ConcurrentModification
Posted by Andrew Robinson <an...@gmail.com>.
Are you using client or server side state saving?
If client, are you using real client side state saving or Trinidad's
default fake client side state using tokens?
Do you have the trinidad cache view root setting enabled?
It looks like both windows are using the same component tree, which is
bad, I dont think that should be happening. I always turn off
Trinidad's view root caching. It is nice for perf. but can be really
bad for bugs.
On Tue, May 6, 2008 at 1:28 AM, Döring Markus
<Ma...@tcc-products.de> wrote:
>
>
>
>
> Hi List,
>
> I have a page that shows a <tr:table>.
>
> This table refreshs with a <tr:poll>
>
>
>
> <tr:poll id="tablePoll" interval="5000" />
>
>
>
> <tr:table rows="20" value="#{tableController.scores}" var="data"
> id="scoreTable" partialTriggers="tablePoll">
>
> … some columns and stuff
>
> </tr:table>
>
>
>
> So far everything works fine, but when I have multiple tabs open in Firefox
> showing the same page, I get the exception attached below.
>
> This is not critical because it's not a use case for our application, but
> I'm trying to understand what happens here.
>
> Also I've noticed that the session is the same across multiple tabs. Is
> there some way to get a new session for every browser tab or is this browser
> specific?
>
>
>
> I'm using:
>
> Facelets 1.1.14
>
> MyFaces 1.1.5
>
> Trinidad 1.0.3
>
> JBoss 4.2.2 GS
>
>
>
> Hope someone can have a look at this and help me understanding how
> everything works.
>
> Thanks
>
>
>
> best regards
>
> Markus Döring
>
> TCC Products GmbH
>
>
>
>
>
>
>
>
>
> Von: pen@tcc-products.de [mailto:pen@tcc-products.de]
> Gesendet: Montag, 5. Mai 2008 18:41
> An: PEN
> Betreff: DPS Error 10.6.65.9
>
>
> ________________________________
>
>
> Log session start time Mon May 05 18:40:43 CEST 2008
>
>
> Time
>
> Thread
>
> Level
>
> Category
>
> Message
>
>
> 6866296
>
> http-0.0.0.0-8080-1
>
> ERROR
>
> facelets.viewhandler
>
> Error Rendering View[/golf/score.xhtml]
>
>
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
> at java.util.AbstractList$Itr.next(AbstractList.java:420)
> at
> org.apache.myfaces.trinidad.component.UIXComponentBase.getFacetsAndChildren(UIXComponentBase.java:586)
> at
> com.sun.facelets.tag.jsf.ComponentSupport.findChildByTagId(ComponentSupport.java:114)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:128)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:119)
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
> at
> com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:144)
> at
> com.sun.facelets.tag.ui.IncludeHandler.apply(IncludeHandler.java:60)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
> at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
> at
> com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:509)
> at
> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:552)
> at
> org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
> at
> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:253)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:210)
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:164)
> at
> org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> de.tccproducts.dps.web.utils.lifecycle.ExceptionFilter.doFilter(ExceptionFilter.java:40)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> 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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
> at
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
> at java.lang.Thread.run(Thread.java:595)
>
>
Re: AW: [Trinidad] ConcurrentModification
Posted by "simon.kitching@chello.at" <si...@chello.at>.
Hi Marcus,
Dealing with multiple windows/tabs is a real pain.
As Andreas notes, each tab always has the same cookies (in all browser
types), so any cookie-based session stuff will mean each tab has the
same http session. It is possible when encoding the sessionId in the
url, but there are still traps. For example, links that navigate within
your app all need to have the sessionId encoded within them. But then if
someone right-clicks on a link in a page and chooses "open in new tab",
then the new tab will have the same sessionId value in the url, so again
the two tabs are using the same session and conflicts occur.
But do you really want separate http sessions anyway? Login details are
normally held in the session, so if your app needs a login, then the
user must log in separately in each tab.
What would be much more useful in most cases is the ability for webapps
to tell windows apart, and create copies of specific data structures on
a per-window basis. But there is really no good way to do this; the http
protocol just does not provide enough data to tell which window a
request is coming from.
Multi-tab applications *can* work if you:
(a) use JSF client-side-state
(b) do not use *any* session-scoped beans, ie use request-scoped objects
only.
It's really painful to work in this mode, though, for anything but
trivial apps.
I'm not aware of any good solution. Note that this is not a JSF-specific
problem; I would expect that all webapps have the same issue.
Re your original "concurrent modification" problem with Trinidad. You
could add a servlet filter to your app which fetches an object from the
user session, then runs the request while holding a lock on that object
(ie calls Filter.doFilter within a synchronized block). This is a fairly
common pattern to prevent concurrent requests by the same user. That
will prevent the initial problem you saw, which is due to two threads
accessing the same object at the same time. But if you use any
session-scoped variables, then there will still be more subtle bugs around..
Regards,
Simon
Hoehmann, Andreas schrieb:
> Hello Markus,
>
> you can have "unique" sessions only with url-encoded-session-handling.
> If you use cookies, then the browser will use the same session-cookie
> for each tab.
> I guess the exception occured if facelets adds automatically new
> childrens for some ui-components. This happend asyn in many tabs but
> will change the same
> objects on the server ... but only a idea ... i'm sure other people
> can tell more about this :)
>
> Regards
> Andreas
>
> ------------------------------------------------------------------------
> *Von:* Döring Markus [mailto:Markus.Doering@tcc-products.de]
> *Gesendet:* Dienstag, 6. Mai 2008 09:29
> *An:* MyFaces Discussion
> *Betreff:* [Trinidad] ConcurrentModification
>
> Hi List,
>
> I have a page that shows a <tr:table>.
>
> This table refreshs with a <tr:poll>
>
>
>
> <tr:poll id="tablePoll" interval="5000" />
>
>
>
> <tr:table rows="20" value="#{tableController.scores}" var="data"
> id="scoreTable" partialTriggers="tablePoll">
>
> … some columns and stuff
>
> </tr:table>
>
>
>
> So far everything works fine, but when I have multiple tabs open
> in Firefox showing the same page, I get the exception attached below.
>
> This is not critical because it’s not a use case for our
> application, but I’m trying to understand what happens here.
>
> Also I’ve noticed that the session is the same across multiple
> tabs. Is there some way to get a new session for every browser tab
> or is this browser specific?
>
>
>
> I’m using:
>
> Facelets 1.1.14
>
> MyFaces 1.1.5
>
> Trinidad 1.0.3
>
> JBoss 4.2.2 GS
>
>
>
> Hope someone can have a look at this and help me understanding how
> everything works.
>
> Thanks
>
>
>
> best regards
>
> Markus Döring
>
> TCC Products GmbH
>
>
>
>
>
>
>
> *Von:* pen@tcc-products.de [mailto:pen@tcc-products.de]
> *Gesendet:* Montag, 5. Mai 2008 18:41
> *An:* PEN
> *Betreff:* DPS Error 10.6.65.9
>
>
>
> ------------------------------------------------------------------------
>
> Log session start time Mon May 05 18:40:43 CEST 2008
>
> *Time*
>
>
>
> *Thread*
>
>
>
> *Level*
>
>
>
> *Category*
>
>
>
> *Message*
>
> 6866296
>
>
>
> http-0.0.0.0-8080-1
>
>
>
> *ERROR*
>
>
>
> facelets.viewhandler
>
>
>
> Error Rendering View[/golf/score.xhtml]
>
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
>
> at java.util.AbstractList$Itr.next(AbstractList.java:420)
> at
> org.apache.myfaces.trinidad.component.UIXComponentBase.getFacetsAndChildren(UIXComponentBase.java:586)
>
> at
> com.sun.facelets.tag.jsf.ComponentSupport.findChildByTagId(ComponentSupport.java:114)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:128)
>
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
>
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
>
> at
> com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:119)
>
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
>
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
>
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
> at
> com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
> at
> com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:144)
>
> at
> com.sun.facelets.tag.ui.IncludeHandler.apply(IncludeHandler.java:60)
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
>
> at
> com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
> at
> com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
>
> at
> com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
>
> at
> com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
>
> at
> com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
>
> at
> com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
>
> at
> com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
> at
> com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:509)
>
> at
> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:552)
>
> at
> org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
>
> at
> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
>
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
>
> at
> javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:253)
>
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:210)
>
> at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:164)
>
> at
> org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>
> at
> de.tccproducts.dps.web.utils.lifecycle.ExceptionFilter.doFilter(ExceptionFilter.java:40)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>
> at
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
>
> 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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
>
> at
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
>
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>
> at
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
>
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
>
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
>
> at java.lang.Thread.run(Thread.java:595)
>
>
>
AW: [Trinidad] ConcurrentModification
Posted by "Hoehmann, Andreas" <an...@siemens.com>.
Hello Markus,
you can have "unique" sessions only with url-encoded-session-handling. If you use cookies, then the browser will use the same session-cookie for each tab.
I guess the exception occured if facelets adds automatically new childrens for some ui-components. This happend asyn in many tabs but will change the same
objects on the server ... but only a idea ... i'm sure other people can tell more about this :)
Regards
Andreas
________________________________
Von: Döring Markus [mailto:Markus.Doering@tcc-products.de]
Gesendet: Dienstag, 6. Mai 2008 09:29
An: MyFaces Discussion
Betreff: [Trinidad] ConcurrentModification
Hi List,
I have a page that shows a <tr:table>.
This table refreshs with a <tr:poll>
<tr:poll id="tablePoll" interval="5000" />
<tr:table rows="20" value="#{tableController.scores}" var="data" id="scoreTable" partialTriggers="tablePoll">
... some columns and stuff
</tr:table>
So far everything works fine, but when I have multiple tabs open in Firefox showing the same page, I get the exception attached below.
This is not critical because it's not a use case for our application, but I'm trying to understand what happens here.
Also I've noticed that the session is the same across multiple tabs. Is there some way to get a new session for every browser tab or is this browser specific?
I'm using:
Facelets 1.1.14
MyFaces 1.1.5
Trinidad 1.0.3
JBoss 4.2.2 GS
Hope someone can have a look at this and help me understanding how everything works.
Thanks
best regards
Markus Döring
TCC Products GmbH
Von: pen@tcc-products.de [mailto:pen@tcc-products.de]
Gesendet: Montag, 5. Mai 2008 18:41
An: PEN
Betreff: DPS Error 10.6.65.9
________________________________
Log session start time Mon May 05 18:40:43 CEST 2008
Time
Thread
Level
Category
Message
6866296
http-0.0.0.0-8080-1
ERROR
facelets.viewhandler
Error Rendering View[/golf/score.xhtml]
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
at java.util.AbstractList$Itr.next(AbstractList.java:420)
at org.apache.myfaces.trinidad.component.UIXComponentBase.getFacetsAndChildren(UIXComponentBase.java:586)
at com.sun.facelets.tag.jsf.ComponentSupport.findChildByTagId(ComponentSupport.java:114)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:128)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:119)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:144)
at com.sun.facelets.tag.ui.IncludeHandler.apply(IncludeHandler.java:60)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:509)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:552)
at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:182)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:253)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:210)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:164)
at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at de.tccproducts.dps.web.utils.lifecycle.ExceptionFilter.doFilter(ExceptionFilter.java:40)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
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.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:595)