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From Stack <st...@duboce.net>
Subject Re: Question about dead datanode
Date Fri, 14 Feb 2014 06:55:06 GMT
On Thu, Feb 13, 2014 at 9:18 PM, Jack Levin <magnito@gmail.com> wrote:

> One other question, we get this:
>
> 2014-02-13 02:46:12,768 WARN org.apache.hadoop.hdfs.DFSClient: Failed to
> connect to /10.101.5.5:50010 for file
> /hbase/img32/b97657bfcbf922045d96315a4ada0782/att/4890606694307129591 for
> block -9099107892773428976:java.net.SocketTimeoutException: 60000 millis
> timeout while waiting for channel to be ready for connect. ch :
> java.nio.channels.SocketChannel[connection-pending remote=/
> 10.101.5.5:50010]
>
>
> Why can't RS do this instead:
>
> hbase-root-regionserver-mtab5.prod.imageshack.com.log.2014-02-10:2014-02-10
> 22:05:11,763 INFO org.apache.hadoop.hdfs.DFSClient: Failed to connect to /
> 10.103.8.109:50010, add to deadNodes and continue
>
> "add to deadNodes and continue" specifically?
>


The regionserver runs on the HDFS API.  The implementations can vary.  The
management of nodes -- their coming and going -- is done inside the HDFS
client code.  The regionserver is insulated from all that goes on therein.

What version of HDFS are you on Jack?

St.Ack

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