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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: IOException: Unable to create hard link ... /snapshots/ ... (errno 17)
Date Tue, 03 May 2011 19:22:37 GMT
Ah, that makes sense.  snapshot_before_compaction is trying to
snapshot, but incremental_backups already created one (for newly
flushed sstables).  You're probably the only one running with both
options on. :)

Can you create a ticket?

On Tue, May 3, 2011 at 2:05 PM, Mck <mck@apache.org> wrote:
> On Tue, 2011-05-03 at 13:52 -0500, Jonathan Ellis wrote:
>> you should probably look to see what errno 17 means for the link
>> system call on your system.
>
> That the file already exists.
> It seems cassandra is trying to make the same hard link in parallel
> (under heavy write load) ?
>
> I see now i can also reproduce the problem with hadoop and
> ColumnFamilyOutputFormat.
> Turning off snapshot_before_compaction seems to be enough to prevent
> it.
>
> ~mck
>
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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