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From Ted Yu <yuzhih...@gmail.com>
Subject Re: restarting region server which shutdown due to GC pause
Date Wed, 21 Jul 2010 17:40:48 GMT
J-D:
Can you elaborate why ssh isn't preferred ?

One solution is to create a light weight Java process that monitors region
server log and perform this duty.

On Wed, Jul 21, 2010 at 10:31 AM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:

> The stance in the hbase dev community on that issue is to let users'
> cluster management tools handle it.
>
> Also, how would you start a java process on a remote machine (if still
> alive) from another java process (the master)? If you can find an
> elegant way that doesn't rely on SSH, this would be a nice
> contribution that users could enable.
>
> J-D
>
> On Wed, Jul 21, 2010 at 10:25 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> > Thanks for the answer.
> >
> > GC pause seems to be a major cause for region server to come down:
> > 2010-07-21 09:07:14,138 WARN org.apache.hadoop.hbase.util.Sleeper: We
> slept
> > 291505ms, ten times longer than scheduled: 10000
> >
> > Is it possible for HBase Master to restart dead region server in this
> case ?
> >
> > On Wed, Jul 21, 2010 at 10:02 AM, Jean-Daniel Cryans <
> jdcryans@apache.org>wrote:
> >
> >> HBaseAdmin.getClusterStatus().getServers()
> >>
> >> J-D
> >>
> >> On Wed, Jul 21, 2010 at 9:56 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> >> > Hi,
> >> > Is there API to query the number of live region servers ?
> >> >
> >> > Thanks
> >> >
> >>
> >
>

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