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From Raju Bairishetti <raju....@gmail.com>
Subject Re: How to bring standby namenode to active mode in case of active host node down?
Date Thu, 20 Aug 2015 14:08:11 GMT
Thanks in advance :).

We are using apache hadoop 2.6 branch.

On Thu, Aug 20, 2015 at 7:33 PM, Raju Bairishetti <raju@apache.org> wrote:

> Hello devs,
>
> We are hitting an issue, in which none of the  namenodes are in active
> state.
>
> Our Setup:
> ---------------
>    We are using *automatic failover* for Hadoop Namenode HA(two node) and
> *SshFencing* as fencing mechanism
>
>
> *1) What happens if namenode host goes down?*
>
> *          This is causing none of the namenodes are active as standby
> namenode** tries to fence the older active node but SshFence will be
> failed as it won't be even able to connect to host itself. Standby node
> rejoin the election after some sleep time and again tries to fence and it
> fails. It keeps on trying until fencing is successful*
>
> *What should be the better way to bring the standby node to active mode in
> case of active namenode host down? *
>
>


-- 
Thanks
Raju Bairishetti,

www.inmobi.com




*2012 ME Best Mobile Ad Network Award Winner

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