Network of brokers : Multicast discovery stopped to work
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Key: AMQ-2774
URL: https://issues.apache.org/activemq/browse/AMQ-2774
Project: ActiveMQ
Issue Type: Bug
Affects Versions: 5.2.0
Environment: Linux
Reporter: Eric
Hi everybody
I experiment a big problem with the multicast discovery algorithm, in a network
of brokers topology.
In some conditions, a broker can't reestablish a distant connection even if the
distant broker is restarted.
I have the log traces that would help to identify the origin of the problem.
When there is no discovery/connection error, I can see these 2 lines in the
activemq log file
#08 Jun 2010 14:31:30,639 INFO [Multicast Discovery Agent Notifier]
org.apache.activemq.network.DiscoveryNetworkConnector
Establishing network connection between from vm://ACCLU-tpnocp04v to
tcp://tpnocp09v-bus:13100?useLocalHost=false
#08 Jun 2010 14:31:30,692 INFO [StartLocalBridge:
localBroker=vm://ACCLU-tpnocp04v#26]
org.apache.activemq.network.DemandForwardingBridge
Network connection between vm://ACCLU-tpnocp04v#26 and
tcp://tpnocp09v-bus/10.18.126.28:13100(MOM-tpnocp09v) has been established.
When the connection is broken, I can see this line in the log.
#11 Jun 2010 12:37:32,585 INFO [Multicast Discovery Agent Notifier]
org.apache.activemq.network.DemandForwardingBridge
ACCLU-tpnocp04v bridge to MOM-tpnocp09v stopped
Then the current ACCLU-tpnocp04v broker tries to reestablish the connection :
#11 Jun 2010 12:37:34,475 INFO [Multicast Discovery Agent Notifier]
org.apache.activemq.network.DiscoveryNetworkConnector
Establishing network connection between from vm://ACCLU-tpnocp04v to
tcp://tpnocp09v-bus:13100?useLocalHost=false
But, here, the second line of the log ("has been established") doesn't appear
in the log file !! I don't know exactly if the connection is up or not.
Then the connection is broken again (look at "Unknown" instead of
"MOM-tpnocp09v".
#11 Jun 2010 13:33:58,655 WARN [ActiveMQ Transport:
tcp://tpnocp09v-bus/10.18.126.28:13100]
org.apache.activemq.network.DemandForwardingBridge
Network connection between vm://ACCLU-tpnocp04v#58 and
tcp://tpnocp09v-bus/10.18.126.28:13100 shutdown due to a remote error:
java.net.SocketException: Connection reset
#11 Jun 2010 13:33:58,657 INFO [NetworkBridge]
org.apache.activemq.network.DemandForwardingBridge^M
ACCLU-tpnocp04v bridge to Unknown stopped
And, now, even if I restart the distant broker ( MOM-tpnocp09v ), no line
(Establishing/Has been established) appears, and no network connection is
reestablished between ACCLU-tpnocp04v and MOM-tpnocp09v. it seems that this
ACCLU-tpnocp04v broker can no longer establish a connection with the
MOM-tpnocp09v broker !!!
The production teams tell me that this problem seems not to be resolved in
fuse-5.3.0.6 version.
Eric-AWL
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