[
https://issues.apache.org/jira/browse/LOG4J2-2269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16448693#comment-16448693
]
ASF subversion and git services commented on LOG4J2-2269:
---------------------------------------------------------
Commit b28496e325663f770bc0889d7f5ed2e07505851d in logging-log4j2's branch
refs/heads/master from [~ckozak]
[ https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;h=b28496e ]
LOG4J2-2269: ReusableLogEventFactory.release clears MutableLogEvent
Fixes a memory leak where parameter references were held beyond
MutableLogEvent usage.
> Memory leaking of replacement parameters in case of enableThreadlocals=true
> ---------------------------------------------------------------------------
>
> Key: LOG4J2-2269
> URL: https://issues.apache.org/jira/browse/LOG4J2-2269
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Reporter: Dmitry Konstantinov
> Assignee: Remko Popma
> Priority: Major
> Attachments: heap_dump_references.png,
> heap_dump_threadLocals_false.hprof.zip,
> heap_dump_threadLocals_true.hprof.zip, test_to_reproduce.zip
>
>
> Use case:
> 1) I have a thread pool with quite large number of threads (around 100)
> 2) Threads from the pool sometimes process some heavy objects. Threads are
> not actively writing into logs (so, a thread may process a task and does not
> log any message).
> 3) As a part of processing for some objects in some non-frequently used
> branch a thread logged a message with heavy replacement parameters
> (parameterized log message is used).
> In this case such heavy replacement parameters are not garbage collected
> until another message will not written within the same thread because
> thread-local ReusableParameterizedMessage and MutableLogEvent objects keep
> references to the replacement parameters.
> Is it possible to cleanup such references when a message is released (for
> example as a part of
> org.apache.logging.log4j.message.ReusableMessageFactory#release and
> org.apache.logging.log4j.core.impl.ReusableLogEventFactory#release) to avoid
> such kind of leaks?
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
