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Posted to log4j-dev@logging.apache.org by "Ralph Goers (JIRA)" <ji...@apache.org> on 2016/07/06 18:23:11 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=15364804#comment-15364804 ]
Ralph Goers edited comment on LOG4J2-1457 at 7/6/16 6:23 PM:
-------------------------------------------------------------
I found https://bugs.openjdk.java.net/browse/JDK-8072592, but you have indicated in the email thread that you do not create any custom ClassLoaders and are only using the standard ClassLoaders provided by the JVM.
I am thinking that for the extended stack trace to work, these classes need to be resolved before control is passed to the AsyncLogger.
was (Author: ralph.goers@dslextreme.com):
I found https://bugs.openjdk.java.net/browse/JDK-8072592, but you have indicated in the email thread that you do not create any custom ClassLoaders and are only using the standard ClassLoaders provided by the JVM.
> 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
> Priority: Critical
> Attachments: 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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