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Re: Suddenly NameNode stopped responding
Sandeep,

and please take a look here http://hbase.apache.org/book.html#hadoop

PS: HDFSv2 supports HA.

On Thu, Nov 28, 2013 at 2:31 PM, Sandeep L <[EMAIL PROTECTED]>wrote:

> Hi,
> Thanks for update.
> After spending quite a bit of time on Hadoop/HBase I couldn't find any
> thing awkward in logs.
> At last what I got to know is the reason for outage is IO Error thrown by
> the one of disk in which we are storing NameNode files.
>
> One more suggestion we need is regarding NameNode HA.
> Since we are using hbase-0.94.1 which version of Hadoop we should apt for
> NameNode HA.
> We can't move away from HBase 0.94.1 in near future, and we want to adapt
> NameNode HA.
> Can someone suggest us some suitable solutions for us?
>
> Thanks,Sandeep.
>
> From: [EMAIL PROTECTED]
> Date: Wed, 27 Nov 2013 10:56:44 +0530
> Subject: Re: Suddenly NameNode stopped responding
> To: [EMAIL PROTECTED]
> CC: [EMAIL PROTECTED]
>
> It is difficult to guess the reason behind this outage without the logs.
> Can we have a look at them? (pastebin). Did you configure HA for namenode?
> Did it failover to standby?
>
>
>
> On Wed, Nov 27, 2013 at 10:29 AM, Sandeep L <[EMAIL PROTECTED]>
> wrote:
>
>
> Hi,
>
> Couple of hours back all of sudden NameNode of our production cluster got
> stopped responding, due to this our HBase also stopped responding(as
> expected).
>
> Here mysterious thing is we unable to get any reason for NameNode
> interruption.
>
> I went through all log files of NameNode and I couldn't find any exception
> in logs.
>
> Can someone guess what could be the probable reason for this issue?
>
> Any one previously faced similar issue?
>
> We are using hbase-0.92.1 with hadoop-1.0.2
>
> If you need any other information please let me know.
>
> Thanks,Sandeep.
>
> --
> Bharath Vissapragada
>
>
>
>
>