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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: GMFD messages
Date Thu, 27 May 2010 14:04:18 GMT
This is a relic of when Gossip was over UDP and had to worry about
packet size.  I created
https://issues.apache.org/jira/browse/CASSANDRA-1138 to remove those
notifications.

I think the correlation with MessageDeserializer is a red herring.
Gossip only happens once per second so I don't see how that could back
MD up.

On Tue, May 25, 2010 at 5:33 PM, Anthony Molinaro
<anthonym@alumni.caltech.edu> wrote:
> Hi,
>
>  I just noticed I have lots of these messages
>
> INFO [GMFD:1] 2010-05-25 23:21:04,070 GossipDigestSynMessage.java (line 152)
>  Remaining bytes zero. Stopping deserialization in EndPointState.
> INFO [GMFD:1] 2010-05-25 23:21:05,224 GossipDigestSynMessage.java (line 129)
>  @@@@ Breaking out to respect the MTU size in EPS. Estimate is 56 @@@@
>
> The first message only occurs on some machines in my cluster.  The second
> on all of them.
>
> The ones with the first message seem to be building up quite a backlog
> in their MessageDeserializer PendingTasks.
>
> I assume there is a correlation, what could be causing this sort of thing?
>
> This cluster is now at 27 m1.xlarge boxes on ec2 running 0.6.2 of some flavor.
>
> Thanks,
>
> -Anthony
>
> --
> ------------------------------------------------------------------------
> Anthony Molinaro                           <anthonym@alumni.caltech.edu>
>



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

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