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From Juan Carlos <jcfernan...@redoop.org>
Subject Re: Configuring Hadoop Client: Where is fail-over configured.
Date Fri, 27 Jun 2014 07:01:55 GMT
Hi Charley,

in hdfs-site.xml you can find the property dfs.ha.namenodes, setting this
property every client will know which NN are elegibles to be active,
nothing else are required in client.


2014-06-26 21:30 GMT+02:00 Charley Newtonne <cnewtonne@gmail.com>:

> I have hadoop 2.4 installed in HA mode using QJM. I have verified the
> cluster failover works as expected. The java clients are configured to
> connect to the active NN by specifying the hdf://nn1.company.com:8020. If
> this nn1 is down, how's the client know the location of the standby nn.
> Where is the client spillover configured?
> I have seen some references that this is configured in client's
> core-site.xml, but this file only specifies the defaultFS (which has the
> value of the logical cluster name) and ZK quorum nodes. None of these
> appear to be related to client side failover.
> Thanks in advance

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