We use the file based locking for a master/slave setup of activemq with NFSv4 as filer for the kahadb.

We recently had a production problem where slaves were booting up while the master was still running. The lock file was still present but I assume that the nfs lock was somehow lost.

Does anyone know in what circumstances this can happen and how to diagnose and ideally avoid it?

Christian

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Christian Schneider
http://www.liquid-reality.de

Open Source Architect
http://www.talend.com

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