Question

I am using log4j for one of my projects and I know it is possible to set thresholds for each appender.

My objective is to log only INFO messages into a file and only ERROR messages in another file.

The problem of using threshold’s for this is that if i set a appender threshold to INFO and the other to ERROR, when I log an ERROR message, that message goes to both files (appenders).

How can I achieve this?

Thanks in advance

Answer 1

You’ll want to use org.apache.log4j.varia.LevelMatchFilter

<filter class="org.apache.log4j.varia.LevelMatchFilter">
            <param name="LevelToMatch" value="ERROR" />
            <param name="AcceptOnMatch" value="true" />
        </filter>