[jira] Resolved: (DIRMINA-584) Using apr-transport crashes jvm on Linux

["Trustin Lee (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DIRMINA-584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Trustin Lee resolved DIRMINA-584.
---------------------------------

    Resolution: Fixed
      Assignee: Trustin Lee

I kept the descriptor property final.  Instead, I changed AprIoProcessor.destroy(AprSession) to return immediately when no session with the descriptor ID is found.  Please confirm if my fix works for you.

> Using apr-transport crashes jvm on Linux
> ----------------------------------------
>
>                 Key: DIRMINA-584
>                 URL: https://issues.apache.org/jira/browse/DIRMINA-584
>             Project: MINA
>          Issue Type: Bug
>          Components: Transport
>    Affects Versions: 2.0.0-M1
>         Environment: Linux jellikit 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux
> java version "1.6.0_06"
> Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
> Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)
> tomcat-native-1.1.13
> apr-1.2.11
>            Reporter: Geoff Cadien
>            Assignee: Trustin Lee
>             Fix For: 2.0.0-M2
>
>
> To reproduce you can simply run the EchoServer from mina-example and use AprIoAcceptor instead of NioAcceptor.  I used the EchoClient from Julien Vermillard's sandbox here: https://svn.apache.org/repos/asf/mina/sandbox/jvermillard/ and used 20 or 30 concurrent connections.
> AprIoProcessor.destroy() is called multiple times when an exception is generated in AbstractPollingIoProcessor (RST, etc.) and either epoll or apr doesn't like to remove a closed fd from the pollset.  I believe that destroy is called twice because AprIoProcessor.state() returns SessionState.OPEN when the native fd is > 0.  I don't believe once open it will ever be 0 again.
> I was able to fix the problem by explicitly settion AprSession.descriptor to 0 after the socket was closed although I'm not sure this is the correct solution.

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