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https://issues.apache.org/jira/browse/MYFACES-3720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656148#comment-13656148
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Leonardo Uribe commented on MYFACES-3720:
-----------------------------------------
I have checked the problem in deep and my opinion is the problem is not in the
converter (you should not worry about how converter instances are instantiated.
It does not matter if is a singleton or if it is created multiple times, the
impact in performance is minimal). Instead, the stack trace shows in some place
inside the code there is a desynchronization between the state and the way
facelets algorithm is generated.
The algorithm in myfaces is ok, both the one that handles the state and the one
that generated unique ids in facelets.
With the information provided I was able to track down the issue to these lines
in pf_ViewAll.xhtml
<p:tab title="Payment/Status">
<ui:include src="/orders/pf_ViewPaymentStatus.xhtml"/>
</p:tab>
<p:tab title="Other">
<ui:include src="/orders/pf_ViewOther.xhtml"/>
</p:tab>
<p:tab title="Attractions">
The id for "Other" link in p:tab is ordersViewForm:orderViewTabView:j_id_b_1_4g
and the id for "Attractions" link is ordersViewForm:orderViewTabView:j_id_b_1_4t
Since the problematic component is at
ordersViewForm:orderViewTabView:j_id_b_1_4q_1 , I suppose there is something
inside
/orders/pf_ViewOther.xhtml
That is causing the problem. Since the id generation start a new "_", you
should take a look at the first occurrence of c:if , ui:include src="#{...}",
c:choose or c:forEach. Probably an use of <c:forEach /> tag could cause the
problem, because it is the only tag that can desynchronize the state (c:forEach
has some issues that cause a lot of trouble as described in issues like).
My suggestion is avoid all use of c:forEach tag. See MYFACES-3570 and
MYFACES-3389 for details. You can also try to comment the code inside that
facelet to see what's the code that is causing trouble.
Please check /orders/pf_ViewOther.xhtml or let us know what's inside this
facelet tag.
For now I'm sure it is not a myfaces issue, but I'll keep this issue open until
we can find what's going on.
> [restoreView/restoreState] java.lang.ClassCastException: java.util.HashMap
> cannot be cast to javax.faces.convert.Converter
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: MYFACES-3720
> URL: https://issues.apache.org/jira/browse/MYFACES-3720
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.1.10, 2.1.11
> Environment: 1. TomEE 1.6.0 snapshot (2013-04-29) which includes
> MyFaces 2.1.11
> 2. PrimeFaces 3.5 and PrimeFaces 4.0 snapshot
> Reporter: Howard W. Smith, Jr.
> Original Estimate: 28h
> Remaining Estimate: 28h
>
> Originally reported as OmniFaces issue # 167 (please take a look at this, as
> I attached some files there in OmniFaces issue tracker)
> https://code.google.com/p/omnifaces/issues/detail?id=167
> OmniFaces response was the following:
> Project Member #3 balusc
> This problem is indeed not related to o:enableRestorableView. The only
> occurrence in the stack trace is just the delegation to super (i.e. the
> process continues less or more as if the o:enableRestorableView was never
> involved):
> UIViewRoot restoredView = super.restoreView(context, viewId);
> Below is stack trace with TomEE 1.6.0 (2013-04-29), myFaces 2.1.11, and
> PrimeFaces 4.0 snapshot. Is this a MyFaces bug or user error?
> May 09, 2013 8:06:54 AM org.apache.catalina.core.StandardWrapperValve invoke
> SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path
> [/mcmsweb] threw exception [Error restoring component:
> ordersViewForm:orderViewTabView:j_id_b_1_4q_1] with root cause
> java.lang.ClassCastException: java.util.HashMap cannot be cast to
> javax.faces.convert.Converter
> at javax.faces.component.UIOutput.restoreState(UIOutput.java:248)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:687)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreStateFromMap(DefaultFaceletsStateManagementStrategy.java:706)
> at
> org.apache.myfaces.view.facelets.DefaultFaceletsStateManagementStrategy.restoreView(DefaultFaceletsStateManagementStrategy.java:340)
> at
> org.apache.myfaces.application.StateManagerImpl.restoreView(StateManagerImpl.java:129)
> at
> org.apache.myfaces.shared.view.ViewDeclarationLanguageBase.restoreView(ViewDeclarationLanguageBase.java:106)
> at
> org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.restoreView(FaceletViewDeclarationLanguage.java:2118)
> at
> org.apache.myfaces.application.ViewHandlerImpl.restoreView(ViewHandlerImpl.java:300)
> at
> javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83)
> at
> org.omnifaces.viewhandler.RestorableViewHandler.restoreView(RestorableViewHandler.java:66)
> at
> javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:83)
> at
> org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:127)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
> org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
> org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:148)
> at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:75)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at pf.LoginFilter.doFilter(LoginFilter.java:244)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
> at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
> at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
> at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
> at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1686)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:722)
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