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https://issues.apache.org/jira/browse/LOG4J2-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15537285#comment-15537285
 ] 

Remko Popma edited comment on LOG4J2-1628 at 12/21/16 10:22 AM:
----------------------------------------------------------------

{code}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" name="pubsub" packages="org.lcogt.commons.log" 
verbose="true">
 
    <Appenders>
        <File name="LogStash" fileName="logstash.log" locking="true" 
bufferSize="0">
            <LCOGTLayout/>
        </File>
    </Appenders>

    <Loggers>
        <asyncLogger name="org.lcogt" level="info" additivity="false">
            <AppenderRef ref="LogStash"/>
        </asyncLogger>
    </Loggers>
</Configuration>
{code}


was (Author: markbowman):
{quote}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn" name="pubsub" packages="org.lcogt.commons.log" 
verbose="true">
 
    <Appenders>
        <File name="LogStash" fileName="logstash.log" locking="true" 
bufferSize="0">
            <LCOGTLayout/>
        </File>
    </Appenders>

    <Loggers>
        <asyncLogger name="org.lcogt" level="info" additivity="false">
            <AppenderRef ref="LogStash"/>
        </asyncLogger>
    </Loggers>
</Configuration>
{quote}

> Scrambled log messages
> ----------------------
>
>                 Key: LOG4J2-1628
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1628
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Appenders
>    Affects Versions: 2.6.2
>         Environment: centos
>            Reporter: Mark Bowman
>
> We have several threads writing to an async file with locking set to true. 
> Under log4j 2.5 the message from each thread are interleaved correctly. Using 
> log4j 2.6.2 some messages are scrambled as if multiple threads are writing to 
> the file simultaneously. Reverting to 2.5 fixes the problem.
> Configuration to follow.



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