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https://issues.apache.org/jira/browse/LOG4J2-3159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17409018#comment-17409018
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ASF subversion and git services commented on LOG4J2-3159:
---------------------------------------------------------

Commit 90e2de3d46eebc3dd6b8a0cee3c8f2a041131374 in logging-log4j2's branch 
refs/heads/release-2.x from Carter Kozak
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=90e2de3 ]

LOG4J2-3159 Fixed an unlikely race condition in Log4jMarker.getParents


> Log4jMarker.getParents() is not thread-safe
> -------------------------------------------
>
>                 Key: LOG4J2-3159
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3159
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: API
>    Affects Versions: 2.14.1
>            Reporter: Carter Kozak
>            Assignee: Carter Kozak
>            Priority: Major
>
> Log4jMarker.getParents() re-reads the volatile parents array to load the 
> reference and length, the array reference may be updated between these two 
> loads.



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