Community
Participate
Working Groups
This *seems* specific to Virgo Jetty server as it has not been observed on Virgo web server (based on Gemini/Tomcat) even when the same dump was provoked. Steps to reproduce: 1. Provoke a dump, for example by reproducing bug 336922 on Virgo Jetty server. Symptoms: [2011-02-11 12:23:36.613] qtp959617423-57 org.eclipse.virgo.medic.eventlog.default ME0002W Dump contributor 'heap' failed during contribution to dump '1297427014490' org.eclipse.virgo.medic.dump.DumpContributionFailedException: Failed to generate heap dump contribution at org.eclipse.virgo.medic.dump.impl.heap.HeapDumpContributor.contribute(HeapDumpContributor.java:64) at org.eclipse.virgo.medic.dump.impl.StandardDumpGenerator.generateDump(StandardDumpGenerator.java:67) at org.eclipse.virgo.medic.dump.impl.StandardDumpGenerator.generateDump(StandardDumpGenerator.java:54) at org.eclipse.virgo.kernel.serviceability.dump.DumpCoordinator.ajc$afterThrowing$org_eclipse_virgo_kernel_serviceability_dump_DumpCoordinator$1$7340b330(DumpCoordinator.aj:48) at org.eclipse.virgo.kernel.model.management.internal.DelegatingManageableArtifact.convertToObjectNames(DelegatingManageableArtifact.java:129) at org.eclipse.virgo.kernel.model.management.internal.DelegatingManageableArtifact.getDependents(DelegatingManageableArtifact.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:167) at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:96) at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:33) at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208) at com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65) at com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666) at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638) at com.sun.jmx.mbeanserver.MXBeanProxy$GetHandler.invoke(MXBeanProxy.java:106) at com.sun.jmx.mbeanserver.MXBeanProxy.invoke(MXBeanProxy.java:148) at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:248) at $Proxy139.getDependents(Unknown Source) at org.eclipse.virgo.kernel.shell.model.helper.StandardRamAccessorHelper.getArtifact(StandardRamAccessorHelper.java:204) at org.eclipse.virgo.apps.admin.web.ArtifactController.data(ArtifactController.java:229) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:534) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:476) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:468) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:935) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:404) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:184) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:870) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:247) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:151) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:346) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1051) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:592) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:214) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:426) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:520) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:528) at java.lang.Thread.run(Thread.java:680) Caused by: java.lang.reflect.InvocationTargetException: null at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.virgo.medic.dump.impl.heap.HeapDumpContributor.contribute(HeapDumpContributor.java:51) ... 60 common frames omitted Caused by: java.io.IOException: File exists at sun.management.HotSpotDiagnostic.dumpHeap(Native Method) ... 65 common frames omitted Flagging against 3.0.0.M01 as this is the closest to the truth even though it has not yet shipped.
Jetty is using logback and this caused a second medic.core bundle to come up in the user region, this published a second heap dump contributor which then failed to write the heap out when the first heap dump contributor had already written it. Fixed by exporting the right logback packages from core so that a second medic bundle isn't needed.
