Hi Everyone,
In normal mode everything runs fine. But when running a jmeter test with
40 concurrent users, the AbstractWidgetDefinitionBuilder throws a
NullPointerException. see the full stacktrace at (1)
java.lang.NullPointerException
at
org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder.setupDefinition(AbstractWidgetDefinitionBuilder.java:109)
(... see 1)
Probably the reason for this error is that the function
public WidgetDefinition buildWidgetDefinition(Element widgetElement,
WidgetDefinitionBuilderContext context)
throws Exception {
it is not thread-save.
I tried the same test with a little modification (buildWidgetDefinition
is synchronized)
public synchronized WidgetDefinition buildWidgetDefinition(Element
widgetElement, WidgetDefinitionBuilderContext context)
throws Exception {
The error (1) doesn't occur anymore, but another one: (see 2) It seems
that the cause for this is very similar to the one above.
Has one of you seen this error when running a stress test? What could i
do to avoid that problem? (i could go on and modify this function to
synchronized as well, but hopefully there is a better solution for this. )
Stacktraces:
(2)
java.lang.NullPointerException
at
org.apache.cocoon.forms.formmodel.WidgetDefinitionBuilderContext.<init>(
.java:36)
at
org.apache.cocoon.forms.formmodel.AbstractContainerDefinitionBuilder.setupContainer(AbstractContainerDefinitionBuilder.java:48)
at
org.apache.cocoon.forms.formmodel.FormDefinitionBuilder.buildWidgetDefinition(FormDefinitionBuilder.java:63)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:220)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:206)
at
org.apache.cocoon.forms.DefaultFormManager.createForm(DefaultFormManager.java:150)
at sun.reflect.GeneratedMethodAccessor252.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:145)
at
org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:204)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at
org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2172)
at
org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:257)
at
org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:127)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at
org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:340)
at
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2758)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:159)
at
org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:915)
at
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.callFunction(FOM_JavaScriptInterpreter.java:767)
at
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(CallFunctionNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:235)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:177)
at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:253)
at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
at
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1154)
at at.workflow.webdesk.Webdesk.service(Webdesk.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.cocoon.servlet.ParanoidCocoonServlet.service(ParanoidCocoonServlet.java:317)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
at.workflow.webdesk.tools.filters.GZIPFilter.doFilter(GZIPFilter.java:31)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
(1)
java.lang.NullPointerException
at
org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder.setupDefinition(AbstractWidgetDefinitionBuilder.java:109)
at
org.apache.cocoon.forms.formmodel.AbstractDatatypeWidgetDefinitionBuilder.setupDefinition(AbstractDatatypeWidgetDefinitionBuilder.java:53)
at
org.apache.cocoon.forms.formmodel.AbstractDatatypeWidgetDefinitionBuilder.setupDefinition(AbstractDatatypeWidgetDefinitionBuilder.java:46)
at
org.apache.cocoon.forms.formmodel.FieldDefinitionBuilder.setupDefinition(FieldDefinitionBuilder.java:39)
at
org.apache.cocoon.forms.formmodel.FieldDefinitionBuilder.buildWidgetDefinition(FieldDefinitionBuilder.java:33)
at
org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder.buildWidgetDefinition(AbstractWidgetDefinitionBuilder.java:91)
at
org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder.buildAnotherWidgetDefinition(AbstractWidgetDefinitionBuilder.java:178)
at
org.apache.cocoon.forms.formmodel.AbstractContainerDefinitionBuilder.setupContainer(AbstractContainerDefinitionBuilder.java:63)
at
org.apache.cocoon.forms.formmodel.FormDefinitionBuilder.buildWidgetDefinition(FormDefinitionBuilder.java:63)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:220)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:206)
at
org.apache.cocoon.forms.DefaultFormManager.createForm(DefaultFormManager.java:150)
at sun.reflect.GeneratedMethodAccessor222.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:145)
at
org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:204)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2172)
at org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:257)
at
org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:127)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:340)
at
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2758)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:159)
at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:915)
at
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.callFunction(FOM_JavaScriptInterpreter.java:762)
at
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(CallFunctionNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:235)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:177)
at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:253)
at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
at
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1154)
at at.workflow.webdesk.Webdesk.service(Webdesk.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.cocoon.servlet.ParanoidCocoonServlet.service(ParanoidCocoonServlet.java:317)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
at.workflow.webdesk.tools.filters.GZIPFilter.doFilter(GZIPFilter.java:31)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
ERROR : JavaException: java.lang.NullPointerException: null -
at.workflow.webdesk.ta.actions.doBooking [2008-01-15 16:41:00,578]
java.lang.NullPointerException
at
org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder.setupDefinition(AbstractWidgetDefinitionBuilder.java:109)
at
org.apache.cocoon.forms.formmodel.FormDefinitionBuilder.buildWidgetDefinition(FormDefinitionBuilder.java:60)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:220)
at
org.apache.cocoon.forms.DefaultFormManager.createFormDefinition(DefaultFormManager.java:206)
at
org.apache.cocoon.forms.DefaultFormManager.createForm(DefaultFormManager.java:150)
at sun.reflect.GeneratedMethodAccessor222.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:145)
at
org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:204)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2172)
at org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:257)
at
org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:127)
at
org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3085)
at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2251)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:161)
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:340)
at
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2758)
at
org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:159)
at org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:915)
at
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.callFunction(FOM_JavaScriptInterpreter.java:762)
at
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(CallFunctionNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:139)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
at
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:235)
at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:177)
at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:253)
at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
at
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1154)
at at.workflow.webdesk.Webdesk.service(Webdesk.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.cocoon.servlet.ParanoidCocoonServlet.service(ParanoidCocoonServlet.java:317)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
at.workflow.webdesk.tools.filters.GZIPFilter.doFilter(GZIPFilter.java:31)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
thanks in advance
--
harald
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