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Posted to log4j-dev@logging.apache.org by "Matt Sicker (JIRA)" <ji...@apache.org> on 2016/09/08 15:12:21 UTC
[jira] [Comment Edited] (LOG4J2-1457) Class loader deadlock when
using async logging
[ https://issues.apache.org/jira/browse/LOG4J2-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15474097#comment-15474097 ]
Matt Sicker edited comment on LOG4J2-1457 at 9/8/16 3:11 PM:
-------------------------------------------------------------
Taking a closer look at this issue again, I could simply remove the initialization of custom log level plugins ahead of time as the documentation states that you need to specify them in your log4j config file anyways.
Edit: wait, I have this backwards. That's the code that can remain unchanged.
was (Author: jvz):
Taking a closer look at this issue again, I could simply remove the initialization of custom log level plugins ahead of time as the documentation states that you need to specify them in your log4j config file anyways.
> Class loader deadlock when using async logging
> ----------------------------------------------
>
> Key: LOG4J2-1457
> URL: https://issues.apache.org/jira/browse/LOG4J2-1457
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.6.1
> Environment: On CentOS 6.7 and Java 1.8.0_60.
> Reporter: Leon Finker
> Assignee: Matt Sicker
> Priority: Critical
> Fix For: 2.7
>
> Attachments: LOG4J2-1457.patch, threaddump.txt
>
>
> We've encountered a class loading deadlock. Please review attached thread dump. Is it possible to have an option of pre-initializing the exception's thread stack on the caller's thread? It's hard to predict what libraries are doing in their classes' static initializers and may eventually end up logging and causing deadlock.
> In the attached thread dump here are the threads of interest:
> "Log4j2-AsyncLogger[AsyncContext@18b4aac2]1" #16 daemon prio=5 os_prio=0 tid=0x00007ff870c7b000 nid=0x79f3 in Object.wait() [0x00007ff839142000]
> java.lang.Thread.State: RUNNABLE
> at java.lang.Class.forName0(Native Method)
> ...
> and
> "1A03340:Company:japan" #568 prio=5 os_prio=0 tid=0x00007ff871677000 nid=0x725 runnable [0x00007ff74bd27000]
> ...<clinit>...
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