EDIT

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">

    <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender"> 

        <param name="Target" value="System.out"/>

        <layout class="org.apache.log4j.PatternLayout"> 

            <param name="ConversionPattern" value="%d %p [%c] - %m%n"/>

        </layout>

        <filter class="org.apache.log4j.filter.ExpressionFilter">

            <param name="expression" value="msg like  '.*has a maxElementsInMemory of 0. This might lead to performance degradation or OutOfMemoryError at Terracotta client.*'" />

            <param name="acceptOnMatch" value="false"/>

        </filter>            

    </appender>

    <root>

        <priority value ="WARN" />

        <appender-ref ref="CONSOLE"/>

    </root>

</log4j:configuration>