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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CASSANDRA-6259) Cassandra 2.0.1 server has too many tcp connections in CLOSE_WAIT
Date Mon, 28 Oct 2013 19:42:30 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brandon Williams reassigned CASSANDRA-6259:
-------------------------------------------

    Assignee: Sylvain Lebresne

Looks like a possible problem closing sockets in the native transport.

> Cassandra 2.0.1 server has too many tcp connections in CLOSE_WAIT
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-6259
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6259
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Prateek
>            Assignee: Sylvain Lebresne
>            Priority: Critical
>
> We are using cassandra 2.0.1 server with cascading client. The cassandra tap used is
https://github.com/ifesdjeen/cascading-cassandra (1.0.0-rc6). The problem arises after the
server is running for a few days. The server has 100,000+ connections in tcp CLOSE_WAIT state
and cannot accept any more connections. All map reduce jobs start failing. This seems to be
a bug with cassandra 2.0.1 server not closing connections properly.
> [(bloomreach-ami) ubuntu@ip-10-91-15-6 :/mnt/cassandra/data]# lsof -n | grep java | grep
CLOSE_WAIT | wc -l
> 116321
> java      25427          ubuntu *537u     IPv4            9337512        0t0        TCP
10.91.15.6:9042->10.171.11.168:34217 (CLOSE_WAIT)
> java      25427          ubuntu *540u     IPv4            9107933        0t0        TCP
10.91.15.6:9042->10.92.99.19:45820 (CLOSE_WAIT)
> java      25427          ubuntu *543u     IPv4            9110100        0t0        TCP
10.91.15.6:9042->10.86.106.249:47585 (CLOSE_WAIT)
> java      25427          ubuntu *544u     IPv4            9110072        0t0        TCP
10.91.15.6:9042->10.86.106.249:47364 (CLOSE_WAIT)
> java      25427          ubuntu *546u     IPv4            9110110        0t0        TCP
10.91.15.6:9042->10.92.99.19:46162 (CLOSE_WAIT)
> java      25427          ubuntu *547u     IPv4            9110093        0t0        TCP
10.91.15.6:9042->10.86.106.249:47518 (CLOSE_WAIT)
> java      25427          ubuntu *548u     IPv4            9337583        0t0        TCP
10.91.15.6:9042->10.171.11.168:34361 (CLOSE_WAIT)
> java      25427          ubuntu *549u     IPv4            9110114        0t0        TCP
10.91.15.6:9042->10.92.99.19:46212 (CLOSE_WAIT)
> java      25427          ubuntu *551u     IPv4            9110117        0t0  



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