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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=21581

NPE in fom_system.js / oac.components.flow.javascript.fom.FOM_Cocoon for calc 
flowscript sample

           Summary: NPE in fom_system.js /
                    oac.components.flow.javascript.fom.FOM_Cocoon for calc
                    flowscript sample
           Product: Cocoon 2
           Version: Current CVS 2.1
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: core
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


was doing some compatibility testing between clients and hit this problem.

IE6 - SP1 - default install
Mozilla 1.4b - default install

steps to reproduce
1) in mozilla - go to http://localhost:8080/cocoon/samples/flow/calc/
2) in IE - go to http://localhost:8080/cocoon/samples/flow/calc/
3) in IE - enter 1.1 and press Enter button
4) in mozilla - enter 1.1 and press Enter button

the mozilla client reports

"resource://org/apache/cocoon/components/flow/javascript/fom/fom_system.js", 
line 4: uncaught JavaScript exception: java.lang.NullPointerException

org.apache.avalon.framework.CascadingRuntimeException: "resource://org/apache/c
ocoon/components/flow/javascript/fom/fom_system.js", line 4: uncaught 
JavaScript exception: java.lang.NullPointerException

cause: java.lang.NullPointerException

full exception chain stacktrace[show]

Original Exception: java.lang.NullPointerException

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.forwardTo
(FOM_Cocoon.java:144)

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.jsFunction_sendPage
(FOM_Cocoon.java:175)

        at inv1.invoke()

        at org.mozilla.javascript.FunctionObject.doInvoke
(FunctionObject.java:523)

        at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:438)

        at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:1104)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:190)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:138)

        at org.mozilla.javascript.continuations.InterpretedFunctionImpl.call
(InterpretedFunctionImpl.java:121)

        at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244)

        at org.mozilla.javascript.ScriptableObject.callMethod
(ScriptableObject.java:1585)

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.hand
leContinuation(FOM_JavaScriptInterpreter.java:588)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke
(CallFunctionNode.java:179)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.Cocoon.process(Cocoon.java:621)

        at org.apache.cocoon.servlet.CocoonServlet.service
(CocoonServlet.java:1088)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)

        at servletFilter.Persistance.doFilter(Persistance.java:77)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:213)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)

        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:256)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:191)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2415)

        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:180)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:171)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:172)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:509)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.coyote.tomcat4.CoyoteAdapter.service
(CoyoteAdapter.java:223)

        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:594)

        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnecti
on(Http11Protocol.java:392)

        at org.apache.tomcat.util.net.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:565)

        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:619)

        at java.lang.Thread.run(Thread.java:536)





stacktrace[hide]

org.apache.avalon.framework.CascadingRuntimeException: "resource://org/apache/c
ocoon/components/flow/javascript/fom/fom_system.js", line 4: uncaught 
JavaScript exception: java.lang.NullPointerException

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.hand
leContinuation(FOM_JavaScriptInterpreter.java:600)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke
(CallFunctionNode.java:179)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke
(MountNode.java:133)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:84)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke
(PreparableMatchNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke
(PipelineNode.java:164)

        at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeN
odes(AbstractParentProcessingNode.java:108)

        at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke
(PipelinesNode.java:161)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:325)

        at org.apache.cocoon.components.treeprocessor.TreeProcessor.process
(TreeProcessor.java:307)

        at org.apache.cocoon.Cocoon.process(Cocoon.java:621)

        at org.apache.cocoon.servlet.CocoonServlet.service
(CocoonServlet.java:1088)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:247)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)

        at servletFilter.Persistance.doFilter(Persistance.java:77)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:213)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:193)

        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:256)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:191)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2415)

        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:180)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:171)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:172)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:509)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:641)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)

        at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNe
xt(StandardPipeline.java:643)

        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:480)

        at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:995)

        at org.apache.coyote.tomcat4.CoyoteAdapter.service
(CoyoteAdapter.java:223)

        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:594)

        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnecti
on(Http11Protocol.java:392)

        at org.apache.tomcat.util.net.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:565)

        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:619)

        at java.lang.Thread.run(Thread.java:536)

Caused by: java.lang.NullPointerException

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.forwardTo
(FOM_Cocoon.java:144)

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_Cocoon.jsFunction_sendPage
(FOM_Cocoon.java:175)

        at inv1.invoke()

        at org.mozilla.javascript.FunctionObject.doInvoke
(FunctionObject.java:523)

        at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:438)

        at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:1104)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:190)

        at 
org.mozilla.javascript.continuations.ContinuationInterpreter.interpret
(ContinuationInterpreter.java:138)

        at org.mozilla.javascript.continuations.InterpretedFunctionImpl.call
(InterpretedFunctionImpl.java:121)

        at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1244)

        at org.mozilla.javascript.ScriptableObject.callMethod
(ScriptableObject.java:1585)

        at 
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.hand
leContinuation(FOM_JavaScriptInterpreter.java:588)

        ... 73 more

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