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From Peter Schuller <>
Subject Re: Too many open files [was Re: Minimizing the impact of compaction on latency and throughput]
Date Wed, 14 Jul 2010 15:28:29 GMT
> [snip]
> I'm not sure that is the case.
> When the server gets into the unrecoverable state, the repeating exceptions
> are indeed "SocketException: Too many open files".
> Although this is unquestionably a network error,  I don't think it is
> actually a
> network problem per se, as the maximum number of sockets open by the
> Cassandra server is at this point is about 8.  When I kill the client,
> sockets
> held are just the listening sockets - no sockets in ESTABLISHED or

Is this based on netstat or lsof or similar? When the node is in the
state of giving these errors, try inspecting /proc/<pid>/fd or use
lsof. Presumably you'll see thousands of fds of some category; either
sockets or files.

(If you already did this, sorry!)

/ Peter Schuller

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