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From Dhanasekaran Anbalagan <bugcy...@gmail.com>
Subject Understand dfs.datanode.max.xcievers
Date Sun, 17 Mar 2013 13:12:56 GMT
Hi Guys,

We are having few data nodes in an inconsistent state.  frequently goes
dead state. Because of DataXceiver Error

In console we seen the Error.
*INFO hdfs.DFSClient: Could not obtain block*
blk_XXXXXXXXXXXXXXXXXXXXXX_YYYYYYYY from any node: java.io.IOException:

currently we have this value.
dfs.datanode.max.xcievers, dfs.datanode.max.transfer.threads = 4096

currently monitering our cluster JVM monitoring using openNMS,
http://i.imgur.com/E1u0fev.png

Not at all hit 4096 value this value for this week . But frequently
the particular node goes dead state why? log says DataXceiver Error.


 dfs.datanode.max.xcievers value set to the particular node or across the
cluster Please guide me.

-Dhanasekaran.




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