Allow configuration of thrift socket backlog
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Key: CASSANDRA-1663
URL: https://issues.apache.org/jira/browse/CASSANDRA-1663
Project: Cassandra
Issue Type: Improvement
Reporter: Dave Revell
Priority: Minor
It would be nice to allow configuration of the Thrift server socket's listen
backlog size. The current limit is sometimes reached on my servers. I believe
Thrift uses the ServerSocket default, which is 50 pending sockets.
This might be able to merge with CASSANDRA-1405, which also involves thrift
socket changes.
When connection volume is high, Cassandra fails to accept some connections
because the socket listen backlog is full. This happens to about 0.1% of
connections in my case. System load and IO are very low, so this does not seem
to be a capacity problem.
Helpful tip: on my Centos 5 box with kernel 2.6.18, the kernel exposes the
number of socket listen queue overflows in netstat. You can do e.g.:
{noformat}
# netstat -s | grep 'listen queue'
123 times the listen queue of a socket overflowed
{noformat}
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