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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: hbase-master-server slept
Date Fri, 08 Feb 2013 17:47:24 GMT
On Fri, Feb 8, 2013 at 1:26 AM, Marcos Ortiz <mlortiz@uci.cu> wrote:
> Regards, So,
> Can you provide more information about your setup?
> - HBase version
> - Hadoop version
> - Operating System
> - Java version

This would be helpful.

I would also like to see that GC log please.

> Did you check the link?
> Todd wrote a series of posts in Cloudera´s blog about Java Long GC pauses,
> HBase and Zookeeper.
> It´s a great read:
> http://www.cloudera.com/blog/2011/02/avoiding-full-gcs-in-hbase-with-memstore-local-allocation-buffers-part-1/
> http://www.cloudera.com/blog/2011/02/avoiding-full-gcs-in-hbase-with-memstore-local-allocation-buffers-part-2/

The master doesn't have memstores so this wouldn't help. In fact it's
pretty rare that we see the master with GC issues. I recall seing
issues with time travelling (machine clock's too slow and ntpd resets
it) or on EC2 where sometimes you'd see random machine pauses out of
nowhere (although that was a long time ago and haven't used EC2
since).

J-D

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