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https://issues.apache.org/activemq/browse/AMQ-1455?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40336
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David Dossot commented on AMQ-1455:
-----------------------------------
I have stopped using VM transport altogether from my embedded client
application, but the problem still happens: the bridge keeps falling down.
I noticed the issue seems to happen if I have a queue browser (from Hermes) on
the same distributed queue my application is using.
I recognize the issue is hard to reproduce on your side, but in the mean time
can the bridge be made more resilient to runtime exceptions so it recovers and
does not stop?
> Network bridge keeps falling down
> ---------------------------------
>
> Key: AMQ-1455
> URL: https://issues.apache.org/activemq/browse/AMQ-1455
> Project: ActiveMQ
> Issue Type: Bug
> Components: Transport
> Affects Versions: 5.0.0
> Environment: apache-activemq-5.0-20071008.215641-19, RHEL 4, JDK
> 1.6.0_02
> Reporter: David Dossot
>
> The bridge between two nodes keeps falling down after a few minutes of use.
> This is maybe a misconfiguration and totally my bad, so here is the network
> config:
> <transportConnectors>
> <transportConnector uri="vm://${esb.node.name}" />
> <transportConnector uri="tcp://localhost:58080"
> discoveryUri="rendezvous://dev-esb-node" />
> </transportConnectors>
> <networkConnectors>
> <networkConnector conduitSubscriptions="true"
> decreaseNetworkConsumerPriority="true" dynamicOnly="true"
> networkTTL="64" uri="rendezvous://dev-esb-node"
> userName="broker" password="XXX" />
> </networkConnectors>
> ${esb.node.name} resolves to "backbone-node-8080" on one box and
> "collection-node-8080" on the other.
> And here are the errors when the bridge crashes:
> 11:04:46,241 DEBUG [org.apache.activemq.network.DemandForwardingBridge]
> backbone-node-8080 Forwarding sub on vm://backbone-node-8080#4 from
> collection-node-8080 : ConsumerInfo {commandId = 4, responseRequired = true,
> consumerId = ID:ddo-mbp.local-51198-1191953085196-0:0:1:1, destination =
> queue://esb.admin.errors, prefetchSize = 500, maximumPendingMessageLimit = 0,
> browser = true, dispatchAsync = false, selector = null, subscriptionName =
> null, noLocal = false, exclusive = false, retroactive = false, priority = 0,
> brokerPath = null, optimizedAcknowledge = false, noRangeAcks = false,
> additionalPredicate = null}
> 11:04:46,250 INFO [org.apache.activemq.network.DemandForwardingBridge]
> Network connection between vm://backbone-node-8080#4 and
> tcp://esb-backbone-node2.dev.com/10.20.116.14:58
> 080 shutdown due to a local error: java.lang.NullPointerException
> 11:04:46,254 DEBUG [org.apache.activemq.network.DemandForwardingBridge] The
> local Exception was:java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.activemq.network.DemandForwardingBridgeSupport.configureMessage(DemandForwardingBridgeSupport.java:539)
> at
> org.apache.activemq.network.DemandForwardingBridgeSupport.serviceLocalCommand(DemandForwardingBridgeSupport.java:561)
> at
> org.apache.activemq.network.DemandForwardingBridgeSupport$1.onCommand(DemandForwardingBridgeSupport.java:137)
> at
> org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:100)
> at
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
> at
> org.apache.activemq.transport.vm.VMTransport.oneway(VMTransport.java:102)
> at
> org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:40)
> at
> org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:59)
> at
> org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1184)
> at
> org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:803)
> at
> org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:838)
> at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:118)
> at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:42)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:619)
> 11:04:46,259 DEBUG [org.apache.activemq.network.DemandForwardingBridge]
> stopping backbone-node-8080 bridge to collection-node-8080 is disposed
> already ? false
> 11:04:46,261 INFO [org.apache.activemq.network.DemandForwardingBridge]
> backbone-node-8080 bridge to collection-node-8080 stopped
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