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From varun kumar <varun....@gmail.com>
Subject Re: A Datanode shutdown question?
Date Thu, 03 Jul 2014 00:12:36 GMT
Generally Datanode sends it heartbeat to namenode for  every 3 seconds.

If datanode stops sending its heartbeat to name node with in 3
seconds,Namenode thinks it is dead.

On Wed, Jul 2, 2014 at 5:03 PM, MrAsanjar . <afsanjar@gmail.com> wrote:

> If a datanode is shut-downed by calling "hadoop-daemons.sh stop datanode",
> how would the namenode gets notified that a datanode is no longer active?
> does datanode send a SHUTDOWN_MSG to the namenode?  does namenode has to
> wait for heartbeat timeout?

Varun Kumar.P

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