Question

How can I best prevent these libraries from flooding my own apps log4j bus? I do not want to set everything to ERROR, but at this rate the vendor library is flooding up the log file at a rate of about a gig/day. I do not want it to log anything to this file…

Answer 1

As suggested by Jon Skeet´s answer, you should configure log4j to ignore the classes from the vendor library. Usually there is a file named log4j.xml that one can put the package names and the threshold category to print like this:

   <category name="httpclient.wire">
      <priority value="INFO"/>
   </category>

   <category name="org.apache.commons.httpclient">
      <priority value="WARN"/>
   </category>

   <category name="org.hibernate">
      <priority value="DEBUG"/>
   </category>

   <category name="net.sf.jasperreports">
      <priority value="ERROR"/>
   </category>

Take a look at the manual for details.