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Jonathan Ellis commented on CASSANDRA-5719: ------------------------------------------- LGTM > Expire entries out of ThriftSessionManager > ------------------------------------------ > > Key: CASSANDRA-5719 > URL: https://issues.apache.org/jira/browse/CASSANDRA-5719 > Project: Cassandra > Issue Type: Improvement > Components: Core > Affects Versions: 1.2.0 > Reporter: Jason Brown > Assignee: Jason Brown > Priority: Minor > Labels: cache, thrift > Fix For: 1.2.7, 2.0 beta 1 > > Attachments: 5719-v1.patch, 5719-v2-cass1_2.patch > > > TSM maintains a map of SocketAddress (IpAddr, and the ephemeral port) to > ClientState. If the connection goes away, for whatever reason, entries are > not removed from the map. In most cases this is a tiny leakage. However, at > Netflix, we auto-scale services up and down everyday, sometimes with client > instance lifetimes of around 36 hours. These clusters can add hundreds of > servers at peak time, and indescriminantly terminate them at the trough. > Thus, those Ip addresses are never coming back (for us). The net effect for > cassandra is that we'll leave thousands of dead entries in the > TSM.activeSocketSessions map. When I looked at an instance in a well-used > cluster yesterday, there were almost 400,000 entries in the map. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira