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From Todd Lipcon <t...@cloudera.com>
Subject Re: NameNode rollEdidLog: removing storage
Date Thu, 14 Jun 2012 16:48:58 GMT
Hi James,

Could you please let us know exactly what version of Hadoop you're
running? This is an area that has had some bug fixes throughout the
last year, so identifying the particular version is important.

-Todd

On Thu, Jun 14, 2012 at 9:16 AM, James Kinley
<jamesrobertkinley@gmail.com> wrote:
> Hi,
>
> Our production cluster started reporting "too many open files" this
> afternoon and subsequently was unable to save any snapshots to disk.
> We have been able to recover it ok, but I would have expected the NN
> to complain more if it cannot save a snapshot. All I saw in the log
> was...
>
> "WARN org.apache.hadoop.hdfs.server.common.Storage: rollEdidLog:
> removing storage <local dir>"
> "WARN org.apache.hadoop.hdfs.server.common.Storage: rollEdidLog:
> removing storage <nfs dir>"
>
> Do you think this should trigger the NN to enter safe mode. The longer
> this goes un-noticed, the more data could be lost if the NN cannot be
> recovered?
>
> Regards,
>
> James.



-- 
Todd Lipcon
Software Engineer, Cloudera

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