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From dialsc <dirk.a.schae...@bluewin.ch>
Subject Re: OutOfMemoryError when reconnecting forwarding bridge
Date Tue, 06 Jul 2010 13:28:10 GMT

hello,

we are running version 5.3.1 but facing the same problem.



Geoffrey Arnold wrote:
> 
> Hi all,
> 
> We have a forwarding bridge between an embedded broker in one VM and a
> remote broker in another VM using the examples from the network-of-brokers
> documentation[1].  While testing failover, we left the embedded broker VM
> running overnight but did not start the remote broker VM.  NOTE: The
> embedded broker VM was idle (we were not testing application logic).
> 
> In the morning the embedded broker VM threw an OutOfMemoryError:
> 
> 	Exception in thread "Simple Discovery Agent:
> java.util.concurrent.ThreadPoolExecutor$Worker@61472b3c"
> java.lang.OutOfMemoryError: Java heap space
> 		at
> org.apache.activemq.openwire.OpenWireFormat.<init>(OpenWireFormat.java:60)
> 		at
> org.apache.activemq.openwire.OpenWireFormat.<init>(OpenWireFormat.java:69)
> 		at
> org.apache.activemq.openwire.OpenWireFormatFactory.createWireFormat(OpenWireFormatFactory.java:62)
> 		at
> org.apache.activemq.transport.TransportFactory.createWireFormat(TransportFactory.java:212)
> 		at
> org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.java:140)
> 		at
> org.apache.activemq.transport.TransportFactory.connect(TransportFactory.java:67)
> 		at
> org.apache.activemq.network.DiscoveryNetworkConnector.onServiceAdd(DiscoveryNetworkConnector.java:111)
> 		at
> org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent$1.run(SimpleDiscoveryAgent.java:164)
> 		at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 		at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 		at java.lang.Thread.run(Thread.java:637)
> 
> Our logs contained repeated (and expected) messages indicating that a
> connection could not be established with the remote broker.  The one thing
> that stands out from these logs is that a new thread was created in the
> embedded broker VM on each attempt to connect to the remote broker VM:
> 
> 	[1259881226751][Thread-10] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 	[1259881227757][Thread-11] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 	[1259881229762][Thread-12] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 	...
> 	[1259888976178][Thread-267] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 	[1259889006398][Thread-268] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 	[1259889036611][Thread-269] Could not start network bridge between:
> vm://embeddedBroker and: tcp://localhost:61616 due to:
> java.net.ConnectException: Connection refused
> 
> The embedded broker VM is configured via Spring as follows:
> 
> 	<amq:broker id="embeddedBroker" brokerName="embeddedBroker" useJmx="true"
> persistent="false" useShutdownHook="true">
> 		<amq:managementContext>
> 			<amq:managementContext createConnector="false"/>
> 		</amq:managementContext>
> 		<amq:networkConnectors>
> 			<amq:networkConnector uri="static:(tcp://localhost:61616)"/>
> 		</amq:networkConnectors>
> 	</amq:broker>
> 
> Any help would be greatly appreciated.
> 
> Thanks,
> Geoff.
> 
> [1] http://activemq.apache.org/networks-of-brokers.html
> 

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