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https://issues.apache.org/jira/browse/AMQ-5896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Christopher L. Shannon resolved AMQ-5896.
-----------------------------------------
Resolution: Fixed
Applied a fix to master
> Problem getting jmx queue when another is deleting during request
> -----------------------------------------------------------------
>
> Key: AMQ-5896
> URL: https://issues.apache.org/jira/browse/AMQ-5896
> Project: ActiveMQ
> Issue Type: Bug
> Reporter: Wouter de Vaal
> Assignee: Christopher L. Shannon
> Fix For: 5.12.0
>
>
> When calling RemoteJMXBrokerFacade to get information on a queue, but while
> doing this another queue can be removed, leaving the method to throw an
> exception:
> {noformat}
> Caused by: java.lang.reflect.UndeclaredThrowableException
> at com.sun.proxy.$Proxy228.getName(Unknown Source)
> at
> org.apache.activemq.web.BrokerFacadeSupport.getDestinationByName(BrokerFacadeSupport.java:131)
> at
> org.apache.activemq.web.BrokerFacadeSupport.getQueue(BrokerFacadeSupport.java:118)
> ... 3 more
> Caused by: javax.management.InstanceNotFoundException:
> org.apache.activemq:type=Broker,brokerName=localhost,destinationType=Queue,destinationName=20150720083000_82a7f1c6-2eb9-11e5-9d34-0242ac110091
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:643)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1464)
> at
> javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:97)
> at
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1328)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1420)
> at
> javax.management.remote.rmi.RMIConnectionImpl.getAttribute(RMIConnectionImpl.java:657)
> at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
> at sun.rmi.transport.Transport$2.run(Transport.java:202)
> at sun.rmi.transport.Transport$2.run(Transport.java:199)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.rmi.transport.Transport.serviceCall(Transport.java:198)
> at
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:567)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.access$400(TCPTransport.java:619)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$1.run(TCPTransport.java:684)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$1.run(TCPTransport.java:681)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:681)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> at
> sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:275)
> at
> sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:252)
> at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:161)
> at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source)
> at
> javax.management.remote.rmi.RMIConnectionImpl_Stub.getAttribute(Unknown
> Source)
> at
> javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.getAttribute(RMIConnector.java:906)
> at
> javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:267)
> ... 7 more
> {noformat}
> So what happens is that method getDestinationByName first gets a list of all
> the queue names. Then it iterates through them when meanwhile a queue gets
> deleted and thus throwing an exception. Fix should probably be in
> BrokerFacadeSupport:
> {noformat}
> protected DestinationViewMBean getDestinationByName(Collection<?
> extends DestinationViewMBean> collection, String name) {
> Iterator<? extends DestinationViewMBean> iter =
> collection.iterator();
> while (iter.hasNext()) {
> DestinationViewMBean destinationViewMBean = iter.next();
> try {
> String destName = destinationViewMBean.getName();
> if (name.equals(destName)) {
> return destinationViewMBean;
> }
> } catch (Exception e){
> continue;
> }
> }
> return null;
> }
> {noformat}
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