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Thread: Pop3Server] thread pool exhausted

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  1. #1
    Join Date
    Nov 2011
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    Default Pop3Server] thread pool exhausted

    Hi,
    we just migrate from single server to multi server, and theres is problem with the pop3 num thread.
    This is the error log from mailbox.log


    2013-01-08 11:10:42,033 WARN [Pop3Server] [] TcpServer/7110 - Thread pool is 101% utilized. 101 out of 100 threads in use.
    2013-01-08 11:10:42,033 ERROR [Pop3Server] [] TcpServer/7110 - cannot handle connection; thread pool exhausted
    java.util.concurrent.RejectedExecutionException
    at java.util.concurrent.ThreadPoolExecutor$AbortPolic y.rejectedExecution(ThreadPoolExecutor.java:1768)
    at java.util.concurrent.ThreadPoolExecutor.reject(Thr eadPoolExecutor.java:767)
    at java.util.concurrent.ThreadPoolExecutor.execute(Th readPoolExecutor.java:658)
    at com.zimbra.cs.tcpserver.TcpServer.run(TcpServer.ja va:202)
    at java.lang.Thread.run(Thread.java:662)
    This problem is occured when doing send/receive, which causing can't receive email at client.

    I already change the value for this
    zmprov gs `zmhostname` |grep zimbraPop3NumThreadszimbra
    Pop3NumThreads: 300
    But it the error still..

    Need some help...

    Regards,

  2. #2
    Join Date
    Nov 2007
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    Default

    Shinju,

    Did you restart zimbra services after:

    zmprov ms this.server.name zimbraPop3NumThreads 300

    ???

    Your log shows only 100 threads, this tells me that you need to refresh the services.

    Oliver

  3. #3
    Join Date
    Nov 2011
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    Default

    Hi Oliver,

    Thanks for the reply.

    Yes i need to restart the service to refresh the configuration. How much do i need to set zimbraPop3NumThreads? Because after i set to 300 itu appear again the error that say
    2013-01-08 13:10:36,896 WARN [Pop3Server] [] TcpServer/7110 - Thread pool is 100% utilized. 301 out of 300 threads in use.
    2013-01-08 13:10:36,896 ERROR [Pop3Server] [] TcpServer/7110 - cannot handle connection; thread pool exhausted
    java.util.concurrent.RejectedExecutionException
    at java.util.concurrent.ThreadPoolExecutor$AbortPolic y.rejectedExecution(ThreadPoolExecutor.java:1768)
    at java.util.concurrent.ThreadPoolExecutor.reject(Thr eadPoolExecutor.java:767)
    at java.util.concurrent.ThreadPoolExecutor.execute(Th readPoolExecutor.java:658)
    at com.zimbra.cs.tcpserver.TcpServer.run(TcpServer.ja va:202)
    at java.lang.Thread.run(Thread.java:662)
    What parameter that i can use to calculate how much thread that need to be configured.

    Regards,

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