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https://issues.apache.org/jira/browse/IMAP-372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrzej Rusin updated IMAP-372:
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Attachment: James Listener Deadlock.txt
Deadlock info extracted from a several-MB thread dump
> 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
> Attachments: 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.
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