When a given logger in a log4j configuration is outputting messages twice to your appender, you might try adding the additivity attribute as a fix:
<logger name="myLogger" additivity="false"> <level value="info"/> <appender-ref ref="myFile"/> </logger>
Same idea for logger or for category. From the DTD (I'm using version 1.2.15):
<!ELEMENT category (param*,(priority|level)?,appender-ref*)> <!ATTLIST category class CDATA #IMPLIED name CDATA #REQUIRED additivity (true|false) "true" > <!ELEMENT logger (level?,appender-ref*)> <!ATTLIST logger name CDATA #REQUIRED additivity (true|false) "true" >
This worked for me. As you can see, the additivity defaults to true. There may be other fixes, but I didn't dig any further after fixing my problem.
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