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From "Leon Finker (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1518) Deadlock when using pure async and toString logs another message
Date Mon, 05 Sep 2016 00:21:22 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15463748#comment-15463748

Leon Finker commented on LOG4J2-1518:

Remko, i added sync policy. But it means logging can happen out of sequence when buffer is
full in all cases and not just toString logging case.

> Deadlock when using pure async and toString logs another message
> ----------------------------------------------------------------
>                 Key: LOG4J2-1518
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1518
>             Project: Log4j 2
>          Issue Type: Bug
>    Affects Versions: 2.6.2
>         Environment: Solaris
>            Reporter: Leon Finker
>            Assignee: Remko Popma
>             Fix For: 2.7
>         Attachments: 10511.jstack, async_deadlock.txt
> Hi,
> It looks like this was reported before in: LOG4J2-471
> We've encountered similar issue with one of the libraries where it's toString was indirectly
also logging. This caused a deadlock when RingBuffer was full. Please see attached stack snippet.
> According to the following docs, it's possible to set sync policy to synchronously log
the event if buffer is full. I don't see it documented. What's the policy option?
> https://issues.apache.org/jira/plugins/servlet/mobile#issue/LOG4J2-1080
> https://logging.apache.org/log4j/2.x/log4j-core/apidocs/org/apache/logging/log4j/core/async/AsyncQueueFullPolicyFactory.html
> Thank you

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