How do I disable jose4j log messages through my log4j config?

Question

I am using jose4j in a java application that I am working on. It is a json web token library, and I've found that putting the package name inside my log4j config file does nothing to quiet the (many) debug logging messages that I am seeing from this thing. Here's my relevant log4j config section

<Root level="debug">
    <AppenderRef ref="Console"></AppenderRef>
</Root>
<Logger name="org.jose4j" level="warn" additivity="false">
    <AppenderRef ref="Console"></AppenderRef>
</Logger>

So, I essentially only want to see log messages from jose4j when they rise to the level of warn (or more dire).

A few things I have been able to gather.

• Setting the root logger to "info" does make the jose4j debug messages go away, so jose4j's logger at least knows about my logging setup.

• It looks like the logger that jose4j uses is org.sl4j

• I had a similar issue yesterday. It seemed like adding a few jars did the trick to fix that issue, but I'm not having luck with this.

I also added this jar to the classpath... this also did not work.

Does anyone know how I can get this library to work with my logging setup?

Answer 1

Two points:

• You need to have only one implementation of the slf4j interface. Just open the org.slf4j.spi.LoggerFactoryBinder and check the Type hierarchy (Ctrl-T in Eclipse).
• For log4j it has to be https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12/1.7.25 , for example.