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https://issues.apache.org/jira/browse/LOG4J2-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17479595#comment-17479595
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Kelvin Do commented on LOG4J2-1514:
-----------------------------------

work for version 3.6.0 and up.

go to lib and remove:

log4j-1.2.17.jar, slf4j-api-1.7.25, slf4j-log4j12-1.7.25.jar

add the flowing to lib

log4j-1.2-api-2.17.0.jar, slf4j-log4j12-1.7.32.jar, log4j-api-2.17.0.jar, 
log4j-core-2.17.0.jar, slf4j-api-1.7.32.jar 

add log4j2.xml to conf folder

example:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>

    <!-- Console Appender -->
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d\{yyyy-MMM-dd HH:mm:ss a} [%t] %-5level 
%logger\{36} - %msg%n" />
    </Console>

    <!-- Rolling File Appender -->
    <RollingFile name="RollingFile">
      <FileName>./logs/zookeeper.log</FileName>
      
<FilePattern>./logs/zookeeper-%d\{yyyy-MM-dd-hh-mm}-%i.log.zip</FilePattern>
      <PatternLayout>
        <Pattern>%d\{yyyy-MMM-dd HH:mm:ss a} [%t] %-5level %logger\{36} - 
%msg%n</Pattern>
      </PatternLayout>
      <Policies>
        <CronTriggeringPolicy schedule="0 0/2 * 1/1 * ? *" />
      </Policies>
      <DefaultRolloverStrategy max="5" />
    </RollingFile>

  </Appenders>
  <Loggers>
    <Logger name="org.apache.zookeeper" level="debug" additivity="false">
      <AppenderRef ref="RollingFile" />
      <AppenderRef ref="Console" />
    </Logger>
    <Root level="INFO">
      <AppenderRef ref="RollingFile" />
      <AppenderRef ref="Console" />
    </Root>
  </Loggers>
</Configuration>

> Help Apache Zookeeper project to upgrade from Log4j 1.x to 2.x
> --------------------------------------------------------------
>
>                 Key: LOG4J2-1514
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1514
>             Project: Log4j 2
>          Issue Type: Sub-task
>            Reporter: Mikael Ståldal
>            Priority: Major
>




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