james-server-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yin,Shiwu (JIRA)" <server-...@james.apache.org>
Subject [jira] [Commented] (IMAP-372) Deadlock in AbstractDelegatingMailboxListener under load
Date Mon, 03 Jun 2013 09:20:21 GMT

    [ https://issues.apache.org/jira/browse/IMAP-372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672942#comment-13672942
] 

Yin,Shiwu commented on IMAP-372:
--------------------------------

Thank you very much for Andrzej, I met the same problem.
                
> Deadlock in AbstractDelegatingMailboxListener under load
> --------------------------------------------------------
>
>                 Key: IMAP-372
>                 URL: https://issues.apache.org/jira/browse/IMAP-372
>             Project: James Imap
>          Issue Type: Bug
>          Components: Mailbox
>            Reporter: Andrzej Rusin
>            Assignee: Eric Charles
>             Fix For: 0.3
>
>         Attachments: james-listener-deadlock-2.txt, James Listener Deadlock.txt
>
>
> In AbstractDelegatingMailboxListener::event, firing the events inside the synchronized
blocks causes a deadlock involving:
> lock on HashMapDelegatingMailboxListener::listeners
> (synchronized methods) lock on SelectedMailboxImpl
> In my example, these 3 methods got interlocked:
> AbstractDelegatingMailboxListener.addListener
> SelectedMailboxImpl.msn
> AbstractDelegatingMailboxListener.removeListener
> My idea to fix it is basically to take the for loop on mListeners outside the synchronized
block in org.apache.james.mailbox.store.AbstractDelegatingMailboxListener.event(Event). That
will not make the propagated event processing in SelectedMailboxImpl hit the synchronized
lock on listeners.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: server-dev-unsubscribe@james.apache.org
For additional commands, e-mail: server-dev-help@james.apache.org


Mime
View raw message