Nodes periodically spike in load
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Key: CASSANDRA-2058
URL: https://issues.apache.org/jira/browse/CASSANDRA-2058
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 0.6.10
Reporter: David King
(Filing as a placeholder bug as I gather information.)
At ~10p 24 Jan, I upgraded our 20-node cluster from 0.6.8->0.6.10, turned on
the DES, and moved some CFs from one KS into another (drain whole cluster, take
it down, move files, change schema, put it back up). Since then, I've had four
storms whereby a node's load will shoot to 700+ (400% CPU on a 4-cpu machine)
and become totally unresponsive. After a moment or two like that, its neighbour
dies too, and the failure cascades around the ring. Unfortunately because of
the high load I'm not able to get into the machine to pull a thread dump to see
wtf it's doing as it happens.
I've also had an issue where a single node spikes up to high load, but
recovers. This may or may not be the same issue from which the nodes don't
recover as above, but both are new behaviour
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