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From Robert Coli <>
Subject Re: Nodes get stuck
Date Wed, 21 Aug 2013 17:48:30 GMT
On Wed, Aug 21, 2013 at 10:47 AM, Robert Coli <> wrote:

> On Tue, Aug 20, 2013 at 11:35 PM, Keith Wright <>wrote:
>> Still looking for help!  We have stopped almost ALL traffic to the
>> cluster and still some nodes are showing almost 1000% CPU for cassandra
>> with no iostat activity.   We were running cleanup on one of the nodes that
>> was not showing load spikes however now when I attempt to stop cleanup
>> there via nodetool stop cleanup the java task for stopping cleanup itself
>> is at 1500% and has not returned after 2 minutes.  This is VERY odd
>> behavior.  Any ideas?  Hardware failure?  Network?  We are not seeing
>> anything there but wanted to get ideas.
> The most obvious answer is that somehow the problem nodes hit a magical
> threshold which makes them "thrash" with GC.
> If you restart the affected nodes, does the error  condition return? If
> so, how quickly?

Lol, missed the rest of the responses on thread. NVMD. :D


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