Wouter de Vaal created AMQ-5896:
-----------------------------------
Summary: 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
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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