OpenJPA + Log4j2 - log4j2

Question

Having problem with integrating OpenJPA with log4j2.
OpenJPA + log4j worked fined
<appender name="OPENJPA_LOG" class="org.apache.log4j.RollingFileAppender">
<param name="maxFileSize" value="5MB" />
<param name="maxBackupIndex" value="10" />
<param name="file" value="./logs/openjpa.log" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c:%L - %m%n" />
</layout>
</appender>
<logger name="openjpa.jdbc.SQL" additivity="false">
<level value="TRACE" />
<appender-ref ref="OPENJPA_LOG" />
</logger>
But it is not working with log4j2.
<RollingFile name="OPENJPA_LOG" fileName="./logs/openjpa.log"
append="true" filePattern="./logs/openjpa.%i.log.gz"
ignoreExceptions="false">
<PatternLayout>
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} - %c [%thread] - %m%n</Pattern>
</PatternLayout>
<Policies>
<SizeBasedTriggeringPolicy size="10MB" />
</Policies>
<DefaultRolloverStrategy max="5" />
</RollingFile>
<Logger name="openjpa.jdbc.SQL" level="TRACE" additivity="false" >
<AppenderRef ref="OPENJPA_LOG" />
</Logger>
How to fix it.

Answer 1

If you still have issues with this you have to double check that in the persistence.xml you set <property name="openjpa.Log" value="slf4j"/>.
Indeed open jpa is not compatible with log4j2 natively so if you use <property name="openjpa.Log" value="log4j"/> you will run into a java.lang.ClassNotFoundException: org.apache.log4j.Priority.
Once openjpa logs are route properly to slf4j it is ok. I hope your application use sllf4j.
Be sure to use proper versions of log4j2 slf4j and bridge and remove all previous log4j1.x and old slf4j dependencies.