Try to cluster instances and obtain... Journal is locked... what is that?

[Grzegorz Kokosiński]

Hi.
I try to cluster two instances of servicemix. Each of them is run  
independly. I set network connector to each other. In each brokerName is  
the same.
One of them writes in logs that:
INFO  - org.apache.activemq.store.DefaultPersistenceAdapterFactory   -  
Journal is locked... waiting 10 seconds for the journal to be unlocked.

After that I can not close that instance, I have to kill it.

What does it mean?

This a piece of $SMX/conf/activemq.xml:

First one:

<beans xmlns:amq="http://activemq.org/config/1.0";>

  <amq:broker id="broker" brokerName="broker" depends-on="jmxServer"  
useShutdownHook="false">

    <amq:transportConnectors>
       <amq:transportConnector uri="tcp://localhost:61617"/> <!--  
discoveryUri="multicast://default"/-->
    </amq:transportConnectors>

    <amq:networkConnectors>
      <amq:networkConnector uri="static://(tcp://localhost:61616)"/>
    </amq:networkConnectors>

     <!-- the rest of config -->

</beans>

Second one:
<beans xmlns:amq="http://activemq.org/config/1.0";>

  <amq:broker id="broker" brokerName="broker" depends-on="jmxServer"  
useShutdownHook="false">

    <amq:transportConnectors>
       <amq:transportConnector uri="tcp://localhost:61616"/> <!--  
discoveryUri="multicast://default"/-->
    </amq:transportConnectors>

    <amq:networkConnectors>
      <amq:networkConnector uri="static://(tcp://localhost:61617)"/>
    </amq:networkConnectors>

     <!-- the rest of config -->

</beans>

Thanks in advance.
Grzesiek