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From "Jason Harvey (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6546) disablethrift results in unclosed file descriptors
Date Fri, 03 Jan 2014 13:51:52 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Harvey updated CASSANDRA-6546:
------------------------------------

    Description: 
Disabling thrift results in unclosed thrift sockets being left around.


Steps to reproduce and observe:

1. Have a handful of clients connect via thrift.
2. Disable thrift.
3. Enable thrift, have the clients reconnect.
4. Observe netstat or lsof, and you'll find a lot of thrift sockets in CLOSE_WAIT state, and
they'll never go away.
  * Also verifiable from org.apache.cassandra.metrics:type=Client,name=connectedThriftClients
MBean.


What's extra fun about this is the leaked sockets still count towards your maximum RPC thread
count. As a result, toggling thrift enough times will result in an rpc_max_threads number
of CLOSED_WAIT sockets, with no new clients able to connect.


  was:
Disabling thrift results in unclosed thrift sockets being left around.


Steps to reproduce and observe:

1. Have a handful of clients connect via thrift.
2. Disable thrift.
3. Enable thrift, have the clients reconnect.
4. Observe netstat or lsof, and you'll find a lot of thrift sockets in CLOSE_WAIT state, and
they'll never go away.
  * Also verifiable in org.apache.cassandra.metrics:type=Client,name=connectedThriftClients
MBean.


What's extra fun about this is the leaked sockets still count towards your maximum RPC thread
count. As a result, toggling thrift enough times will result in an rpc_max_threads number
of CLOSED_WAIT sockets, with no new clients able to connect.



> disablethrift results in unclosed file descriptors
> --------------------------------------------------
>
>                 Key: CASSANDRA-6546
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6546
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jason Harvey
>            Priority: Minor
>
> Disabling thrift results in unclosed thrift sockets being left around.
> Steps to reproduce and observe:
> 1. Have a handful of clients connect via thrift.
> 2. Disable thrift.
> 3. Enable thrift, have the clients reconnect.
> 4. Observe netstat or lsof, and you'll find a lot of thrift sockets in CLOSE_WAIT state,
and they'll never go away.
>   * Also verifiable from org.apache.cassandra.metrics:type=Client,name=connectedThriftClients
MBean.
> What's extra fun about this is the leaked sockets still count towards your maximum RPC
thread count. As a result, toggling thrift enough times will result in an rpc_max_threads
number of CLOSED_WAIT sockets, with no new clients able to connect.



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