NullPointerException at AbstractFlowExecutionRepository.getConversation

[Havelock]

Im having a problem with exception handling. If there is an exception thrown in the first state of a flow then a NullPointerException is thrown at AbstractFlowExecutionRepository.getConversation

At the stacktrace you can see an IllegalArgumentException being thrown by the start state of a flow. I have a transition to catch all exceptions and go to a view-state showing an error page.

Doing some debug i reached the piece of code where exception is throwed, it seems the key hasn't been set allready. Searching on google i found an old issue which is supposed to be solved but seems to be the exact problem i have.

I need a way to solve this issue, I would appreciate any help.
Thanks.

Im using spring-web 2.5.6 and spring webflow 2.0.5.RELEASE.
That with EJB3 and JSF.
JBoss 4.2

The xml flow:

<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/webflow
        http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd" start-state="listTM" >

	<!-- Handlers -->
	<var name="handler" class="com.idest.base.prototype.handlers.ExceptionThrowerr" />

	<view-state id="listTM" >
		<on-entry>
			<evaluate expression="handler.throwException()" />
		</on-entry>
		<transition on="paginar" to="listTM" />
		<transition on-exception="java.lang.Exception" to="estatFinalError" validate="false" />
	</view-state>


	<view-state id="estatFinalError" view="error.xhtml" />
</flow>

The line where it throws the nullpointer

ConversationId conversationId = (ConversationId) ((CompositeFlowExecutionKey) key).getExecutionId();

The stacktrace

13:44:37,078 DEBUG [TransitionExecutingFlowExecutionExceptionHandler] Exposing flow execution exception root cause java.lang.IllegalArgumentException: forzada under attribute 'rootCauseException'
13:44:37,078 DEBUG [Transition] Executing [Transition@157f509 on = *, to = estatFinalError]
13:44:37,093 DEBUG [Transition] Exiting state 'listParam'
13:44:37,093 DEBUG [DispatcherServlet] Could not complete request
java.lang.NullPointerException
	at org.springframework.webflow.execution.repository.support.AbstractFlowExecutionRepository.getConversation(AbstractFlowExecutionRepository.java:175)
	at org.springframework.webflow.execution.repository.impl.DefaultFlowExecutionRepository.updateFlowExecutionSnapshot(DefaultFlowExecutionRepository.java:127)
	at org.springframework.webflow.engine.impl.FlowExecutionImpl.updateCurrentFlowExecutionSnapshot(FlowExecutionImpl.java:408)
	at org.springframework.webflow.engine.impl.RequestControlContextImpl.updateCurrentFlowExecutionSnapshot(RequestControlContextImpl.java:209)
	at org.springframework.webflow.engine.ViewState.updateHistory(ViewState.java:271)
	at org.springframework.webflow.engine.ViewState.exit(ViewState.java:211)
	at org.springframework.webflow.engine.Transition.execute(Transition.java:224)
	at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:377)
	at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:201)
	at org.springframework.webflow.engine.support.TransitionExecutingFlowExecutionExceptionHandler.handle(TransitionExecutingFlowExecutionExceptionHandler.java:110)
	at org.springframework.webflow.engine.FlowExecutionExceptionHandlerSet.handleException(FlowExecutionExceptionHandlerSet.java:113)
	at org.springframework.webflow.engine.Flow.handleException(Flow.java:608)
	at org.springframework.webflow.engine.impl.FlowExecutionImpl.tryFlowHandlers(FlowExecutionImpl.java:637)
	at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleException(FlowExecutionImpl.java:595)
	at org.springframework.webflow.engine.impl.FlowExecutionImpl.start(FlowExecutionImpl.java:223)
	at org.springframework.webflow.executor.FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:140)
	at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
	at org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:154)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:260)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:366)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:493)
	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:619)

[Havelock]

I believe i placed the thread in the wrong place. I read Spring Webflow instead of Spring Workflow. Could someone delete it, ill post it again at the Web section?

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