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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-4387) Multiple RPC threads waiting on a single thread
Date Fri, 20 Sep 2013 22:22:54 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis resolved CASSANDRA-4387.
---------------------------------------

    Resolution: Cannot Reproduce
    
> Multiple RPC threads waiting on a single thread
> -----------------------------------------------
>
>                 Key: CASSANDRA-4387
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4387
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.0.7
>         Environment: sun java 6.24
>            Reporter: Jason Harvey
>            Priority: Minor
>         Attachments: output.log
>
>
> I'm investigating a load spike issue on our cluster. A thread dump that I collected during
a spike shows a peculiar symptom. There are 162 RPC threads all parked waiting on a single
java.util.concurrent.SynchronousQueue$TransferStack thread. Brandon took a peek and recommended
I create a ticket for investigation.
> Full thread dump attached. The thread which is being waited on is 0x00000006ac1aba60.

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