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From "Dan Checkoway (JIRA)" <>
Subject [jira] [Created] (AMQ-3489) Slave not replicating consumption with Pure Master Slave
Date Thu, 08 Sep 2011 15:57:08 GMT
Slave not replicating consumption with Pure Master Slave

                 Key: AMQ-3489
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.5.0, 5.4.2
            Reporter: Dan Checkoway

I'm seeing some strange behavior with ActiveMQ 5.4.2 pure master slave setup...

5.4.2 master running on mqmaster01:

 <broker xmlns="" brokerName="localhost" dataDirectory="${activemq.base}/data"
destroyApplicationContextOnStop="true" schedulerSupport="false" advisorySupport="false">
            <transportConnector name="openwire" uri="tcp://"/>

5.4.2 slave running on mqslave01:

    <broker masterConnectorURI="tcp://mqmaster01:61616" shutdownOnMasterFailure=
"false" xmlns="" brokerName="localhost" da
taDirectory="${activemq.base}/data" destroyApplicationContextOnStop="true" sched
ulerSupport="false" advisorySupport="false">
            <transportConnector name="openwire" uri="tcp://"/>

Producers and consumers are using this connection URL:


Here's what I'm seeing.  I start up the master.  My producers/consumers connect immediately
(they were waiting to connect) and begin doing their thing.

I then start up the slave (with a freshly emptied ./data dir).  The slave connects to the
master, as witnessed by this in data/activemq.log on mqslave01:

2011-08-24 22:51:48,833 | INFO  | Starting a slave connection between vm://localhost#0 and
tcp://mqmaster01:61616 | | main
2011-08-24 22:51:48,843 | INFO  | Slave connection between vm://localhost#0 and tcp://mqmaster01/
has been established. | | main

Shortly thereafter, a message is sent to a queue.  A consumer consumes it.  On mqmaster01,
I can see on http://mqmaster01:8161/admin/queues.jsp that the enqueue/dequeue count went up
by one, and "Number Of Pending Messages" is zero.  All good, right?

Yeah, except mqslave01 now shows Messages Enqueued = 1, and Number Of Pending Messages = 1.
 As more messages run through the system, mqslave01's enqueue & pending count continues
to go up, but the dequeue count remains at zero.  I don't understand why the slave isn't replicating
the consumption of these messages...

Has anybody seen this before?  Any idea what might be causing it?  Did I screw something up
in my configuration, i.e. with schedulerSupport="false" or advisorySupport="false"?

Any help would be much appreciated... 


Torsten then posted:


I just gave it a quick test here using the latest 5.5 release and there does indeed seem to
be an issue.
Was sending and consuming msgs on the master broker using a new queue and the JMX properties
got updated correctly on both master and slave.
However when sending some msgs to queue example.A which also has a Camel consumer connected,
I noticed the same problem as reported here. On the slave the Enqueue Count rises correctly
but dequeue and dispatch count remain 0. QueueSize is at EnqueueCount number, despite all
msgs being consumed already.

I further noticed the following error in the slave log:

WARN | Async error occurred: java.lang.IllegalStateException: Cannot lookup a connection that
had not been registered:
java.lang.IllegalStateException: Cannot lookup a connection that had not been registered:
        at org.apache.activemq.command.RemoveInfo.visit(
        at org.apache.activemq.transport.ResponseCorrelator.onCommand(
        at org.apache.activemq.transport.TransportFilter.onCommand(
        at org.apache.activemq.transport.vm.VMTransport.iterate(
        at org.apache.activemq.thread.DedicatedTaskRunner.runTask(
        at org.apache.activemq.thread.DedicatedTaskRunner$

There seems to be a problem here.

Dan, if you have the time, could you raise a new JIRA for this problem?


Torsten Mielke 

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