[Karaf] Possible hang with slave instances of Karaf when using Oracle JDBC lock.
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                 Key: FELIX-2129
                 URL: https://issues.apache.org/jira/browse/FELIX-2129
             Project: Felix
          Issue Type: Bug
          Components: Karaf
         Environment: Oracle XE Database backend for Karaf JDBC locking.
            Reporter: Jamie goodyear


Possible hang with slave instances of Karaf when using Oracle JDBC lock.

If we start up the master and slave as normal, then try to stop the slave, it 
does not release its attempted JDBC lock, and therefore hangs during shutdown. 
If we then stop the master, the slave throws an error and finally exits.


The problem is in the FOR UPDATE statement in setUpdateCursor, adding NOWAIT 
resolves the issue.

I'll be supplying a patch for this.

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