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From khandelwalanuj <khandelwal.anu...@gmail.com>
Subject ActiveMQ slave broker opening it's connector
Date Mon, 27 Apr 2015 07:35:12 GMT
Hi,

Using ActiveMQ-5.11.1. 
Topology : [shared-storage-master-slave ] with kahadb
Kahadb store location is on NFS. 

Yesterday we faced a strange issue where suddenly failover broker opened
it's transport connector and started accepting connections. Both primary and
failover were serving the clients. Please note that there were not restart.

Details: 
>From the logs: Failvoer logs says that it checks each 10 seconds to acquire
the lock but for that time, it 
didn't check for 3 minutes and then suddenly acquires the lock over kahadb.
And on the other side primary broker was continuously serving the clients.
*This is very strange but how both primary and failvoer can serve the
clients simultaneously ? Is there some bug in kahadb locking procedure? 
*

Failover logs: 
[20150425 *08:02:57*.356 EDT (main)
org.apache.activemq.store.SharedFileLocker#doStart 58 INFO] - Database
/local/pod/activemq/kahadb/lock is locked... wait
ing 10 seconds for the database to be unlocked. Reason: java.io.IOException:
File '/local/pod/activemq/kahadb/lock' could not be locked. 
[20150425* 08:03:07*.359 EDT (main)
org.apache.activemq.store.SharedFileLocker#doStart 58 INFO] - Database
/local/pod/activemq/kahadb/lock is locked... wait
ing 10 seconds for the database to be unlocked. Reason: java.io.IOException:
File '/local/pod/activemq/kahadb/lock' could not be locked. 
[20150425 *08:03:17*.365 EDT (main)
org.apache.activemq.store.SharedFileLocker#doStart 58 INFO] - Database
/local/pod/activemq/kahadb/lock is locked... wait
ing 10 seconds for the database to be unlocked. Reason: java.io.IOException:
File '/local/pod/activemq/kahadb/lock' could not be locked. 
[20150425 *08:06:21*.963 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase$Metadata#read 168 INFO] -
KahaDB is version 5 
[20150425 *08:06:21*.983 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase#recover 603 INFO] -
Recovering from the journal ... 
[20150425 08:06:22.052 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase#recover 616 INFO] -
Recovery replayed 5670 operations from the journal 
in 0.085 seconds. 
[20150425 08:06:25.426 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase$Metadata#read 168 INFO] -
KahaDB is version 5 
[20150425 08:06:25.457 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase#recover 603 INFO] -
Recovering from the journal ... 
[20150425 08:06:25.458 EDT (main)
org.apache.activemq.store.kahadb.MessageDatabase#recover 616 INFO] -
Recovery replayed 33 operations from the journal in
 0.009 seconds. 


Thanks,
Anuj










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