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From Christopher <>
Subject Re: Relocated Accumulo Master can not get lock
Date Mon, 01 Jul 2013 00:12:10 GMT
It seems like there's another master still running somewhere. If
that's not correct, a simple fix is to restart zookeeper when you
restart Accumulo (stop Accumulo, restart ZK, start Accumulo).

If it happens again, it might be worth checking the change
logs/release notes to see if this might be caused by one of the bugs
fixed by ZK 3.4.4 or 3.4.5, or Accumulo 1.4.3.

Christopher L Tubbs II

On Sat, Jun 29, 2013 at 11:25 AM, Thomas Jackson <> wrote:
> Greetings,
> I am trying to relocate the Accumulo Master process to another server.  I
> have already brought down the Accumulo cluster (restarted zookeepers as
> well) and have updated all references that pointed to the original master
> server to point to the new master server.
> However, after restarting Accumulo the master server is not starting.  In
> the master log I see the following error:
> INFO:  trying to get master lock
> INFO:  Failed to get master lock, even after waiting for session timeout,
> becoming back-up server
> I'm hoping that someone has encountered this before and it's simple tweak I
> missed.
> I'm running Accumulo 1.4.2, Zookeeper 3.4.3 Hadoop 1.0.3
> Thanks,
> Tom

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