java - off - How to disable log4j in 3rd party jar?

log4j disable logging for method (2)

I'm experimenting writing a java SE swing application using JBoss weld. Weld configures logging with log4j using the following log4j.xml file in the jar:

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

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    contributors by the @authors tag. See the copyright.txt in the
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    Licensed under the Apache License, Version 2.0 (the "License");
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<log4j:configuration xmlns:log4j="" debug="false">

    <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
        <param name="Target" value="System.out"/>
        <layout class="org.apache.log4j.PatternLayout">
            <!-- The default pattern: Date Priority [Category] Message\n -->
            <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{2}] %m%n"/>
        <filter class="org.apache.log4j.varia.StringMatchFilter">
         <param name="AcceptOnMatch" value="false" />
         <param name="StringToMatch" value="Failure while notifying an observer of event [a]" />

    <!-- ############### Weld logging ################### -->

    <category name="org.jboss.weld">
        <priority value="INFO"/>

        <priority value="INFO"/>
        <appender-ref ref="CONSOLE"/>


I want to disable logging altogether in my application. I tried to disable it providing a file as follows:

log4j.rootLogger=OFF, CONSOLE

No matter what I try to do I cannot prevent the log4j messages from Weld to show up in the console. All I want to do is completely disable logging. But How?

Answer #1

I think the default log configuration for third part jars won`t print any message into STDOUT or FILE.

But if you want override the default log configuration without document, the best solution is de-compile the jar files and find out how it load the configuration.

Answer #2

If a log4j xml-format configuration file is present, it takes precedence over property files. That is log4j defined behavior. So you can put your configuration in log4j.xml and it should take effect.