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From Allen Wittenauer <awittena...@linkedin.com>
Subject Re: hadoop-cluster-1.ic node errors and warnings
Date Mon, 21 Jun 2010 18:28:32 GMT

[Cutting the CC: line down to size ]

On Jun 18, 2010, at 3:37 AM, Bikash Singhal wrote:

> Hi folks ,
> 
> I have received this error in the hadoop cluster. Has anybody anybody
> seen this . Any solution.


Since you aren't picking anything out and you've shared a bunch of messages, I'm going to
go with the first one.  If you have a specific question about a specific message, it would
be helpful to point it out.


> --------------------- namenode errors and warning ------------------
> 
> 2010-06-17 18:35:19,970 WARN
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Not able to place
> enough replicas, still in need of 1

This isn't an error, but a warning.

IIRC, you can get this either if the datanodes are out of space or there are not have enough
racks defined to meet the defined replication policy.  For example, requiring 10 replicas
when only 3 racks are present will generate this warning.
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