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From "Andreas Aumayr (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-5122) Unnecessary log of Stacktrace within DiscoveryNetworkConnector
Date Thu, 27 Mar 2014 12:10:17 GMT
Andreas Aumayr created AMQ-5122:
-----------------------------------

             Summary: Unnecessary log of Stacktrace within DiscoveryNetworkConnector
                 Key: AMQ-5122
                 URL: https://issues.apache.org/jira/browse/AMQ-5122
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Connector
    Affects Versions: 5.9.0
            Reporter: Andreas Aumayr
            Priority: Minor


Setup:
 - one embedded broker with a configured networkConnector:
	<networkConnectors>
		<networkConnector name="linkToParentBroker"
			uri="static:(tcp://127.0.0.1:61617)" />
	</networkConnectors>

- a logLevel that shows at leat WARN messages
- no other broker available (i.e. nobody is listening on tcp://127.0.0.1:61617)

I would expect to see a warning in the logfiles that indicates: "Hey, I'm not able to start
the network bridge you configured". But instead it prints out the warning and a full stacktrace.

2014-03-27_13:01:21.777 [ActiveMQ Task-1] WARN  o.a.a.network.DiscoveryNetworkConnector -
Could not start network bridge between: vm://localhost?async=false&network=true and: tcp://127.0.0.1:61617
due to: {}
java.net.ConnectException: Connection refused: connect
	at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.6.0_25]
	at java.net.PlainSocketImpl.doConnect(Unknown Source) ~[na:1.6.0_25]
	at java.net.PlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.6.0_25]
	at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.6.0_25]
	at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.6.0_25]
	at java.net.Socket.connect(Unknown Source) ~[na:1.6.0_25]
	at org.apache.activemq.transport.tcp.TcpTransport.connect(TcpTransport.java:496) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.tcp.TcpTransport.doStart(TcpTransport.java:459) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:55) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.AbstractInactivityMonitor.start(AbstractInactivityMonitor.java:138)
~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72)
~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.network.DemandForwardingBridgeSupport.start(DemandForwardingBridgeSupport.java:204)
~[activemq-all-5.9.0.jar:5.9.0]
	at org.apache.activemq.network.DiscoveryNetworkConnector.onServiceAdd(DiscoveryNetworkConnector.java:152)
~[bin/:5.9.0]
	at org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent$1.run(SimpleDiscoveryAgent.java:184)
[activemq-all-5.9.0.jar:5.9.0]
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) [na:1.6.0_25]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.6.0_25]
	at java.lang.Thread.run(Unknown Source) [na:1.6.0_25]

Looking at the code (DiscoveryNetworkConnector.java) we can see that there are two logging
statements. One Warning and one Debug:
                LOG.warn("Could not start network bridge between: {} and: {} due to: {}",
new Object[]{ localURI, uri, e });
                LOG.debug("Start failure exception: ", e);

I think it would be sufficient if the warning logged only the message from the exception,
but not the whole stacktrace.



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