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From Christian Posta <christian.po...@gmail.com>
Subject Re: NPE during stop/start route attempts with JMX
Date Thu, 24 Oct 2013 18:38:54 GMT
Not sure how you'd get a NPE in that method... and the source lines in
2.8.0 and what you posted from your log don't match up... you sure about
the version?


On Thu, Oct 24, 2013 at 8:01 AM, catalyst156 <kyle.n.reich@gmail.com> wrote:

> ISSUE:
> Our application currently uses the Spring DSL to define a context with a
> set
> of routes.  What I'm attempting to do is programmatically add/stop/remove
> new routes to the existing context during runtime based on user actions.
> I've been able to use JMX to interface with the existing context following
> this example:
>
> http://www.consulting-notes.com/2010/08/managing-camel-routes-with-jmx-apis.html
> <
> http://www.consulting-notes.com/2010/08/managing-camel-routes-with-jmx-apis.html
> >
> .  (Ideally I would like to interface with the existing context and use the
> Java DSL to manage it, but I haven't found a way to do that yet...)  I've
> been able to add a route and perform a few get requests on it (getStatus,
> getRouteId, etc.) but whenever I attempt to stop the route, I get a NPE
> (see
> stack trace excerpt below).  I can confirm through jConsole and our
> ServiceMix log that the route is stopped.  If I then remove it, I receive a
> similar NPE, but again, it disappears from jConsole.  (Additionally, if I
> then dump the routes from the context, the route is still listed.)  This
> series of NPEs does NOT occur on pre-defined routes.
>
> Can anyone confirm if upgrading would fix this issue or provide some
> insight
> one what might be the cause?
>
> BACKGROUND:
> Our application is currently using Camel v.2.8.0.  While troubleshooting
> this issue I came across a similar looking issue (
>
> http://camel.465427.n5.nabble.com/MBean-Runtime-Exception-in-getRoutePolicyList-td4717413.html
> <
> http://camel.465427.n5.nabble.com/MBean-Runtime-Exception-in-getRoutePolicyList-td4717413.html
> >
> ) which points to a potential issue with JMX registry in older versions of
> Camel.  I'm not sure I can easily upgrade our application to a newer Camel
> version to try it out so I'm hoping that someone can confirm that this
> would/wouldn't work in the latest versions.
>
> STACK-TRACE
> javax.management.MBeanException: RuntimeException thrown in
> RequiredModelMBean while trying to invoke operation stop
>         at
>
> javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1091)
>         at
>
> javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:955)
>         at
>
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
>         at
> com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788)
>         at sun.reflect.GeneratedMethodAccessor108.invoke(Unknown Source)
>         at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
>         at sun.rmi.transport.Transport$1.run(Transport.java:159)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
>         at
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
>         at
>
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
>         at
>
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
>         at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
>         at
>
> sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:273)
>         at
> sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:251)
>         at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:160)
>         at
> javax.management.remote.rmi.RMIConnectionImpl_Stub.invoke(Unknown
> Source)
>         at
>
> javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.invoke(RMIConnector.java:1017)
>         at controllers.proto.Proto.stopRoute(Proto.java:199)
>         at
>
> Routes$$anonfun$routes$1$$anonfun$applyOrElse$110$$anonfun$apply$110.apply(routes_routing.scala:1361)
>         at
>
> Routes$$anonfun$routes$1$$anonfun$applyOrElse$110$$anonfun$apply$110.apply(routes_routing.scala:1361)
>         at
>
> play.core.Router$HandlerInvoker$$anon$6$$anon$2.invocation(Router.scala:164)
>         at play.core.Router$Routes$$anon$1.invocation(Router.scala:345)
>         at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:31)
>         at play.GlobalSettings$1.call(GlobalSettings.java:63)
>         at play.core.j.JavaAction$$anon$2.apply(JavaAction.scala:74)
>         at play.core.j.JavaAction$$anon$2.apply(JavaAction.scala:73)
>         at play.libs.F$Promise$PromiseActor.onReceive(F.java:420)
>         at
>
> akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:159)
>         at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)
>         at akka.actor.ActorCell.invoke(ActorCell.scala:386)
>         at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)
>         at akka.dispatch.Mailbox.run(Mailbox.scala:212)
>         at
>
> akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:502)
>         at
> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:262)
>         at
>
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975)
>         at
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1478)
>         at
>
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)
> Caused by: java.lang.NullPointerException
>         at
>
> org.apache.camel.impl.DefaultCamelContext.stopRouteService(DefaultCamelContext.java:1762)
>         at
>
> org.apache.camel.impl.DefaultCamelContext.stopRouteService(DefaultCamelContext.java:1756)
>         at
>
> org.apache.camel.impl.DefaultCamelContext.stopRoute(DefaultCamelContext.java:763)
>         at
> org.apache.camel.management.mbean.ManagedRoute.stop(ManagedRoute.java:151)
>         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 sun.reflect.misc.Trampoline.invoke(MethodUtil.java:37)
>         at sun.reflect.GeneratedMethodAccessor189.invoke(Unknown Source)
>         at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:244)
>         at
>
> javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1074)
>         at
>
> javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:955)
>         at
>
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
>         at
> com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360)
>         at
>
> javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788)
>         at sun.reflect.GeneratedMethodAccessor108.invoke(Unknown Source)
>         at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
>         at sun.rmi.transport.Transport$1.run(Transport.java:159)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
>         at
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
>         at
>
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
>         at
>
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
>         at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
>
>
>
>
> --
> View this message in context:
> http://camel.465427.n5.nabble.com/NPE-during-stop-start-route-attempts-with-JMX-tp5742131.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>



-- 
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

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