(I am posting this because I have been privately asked already couple of
times)
Helping google: How do I stop the more verbose logging in Struts 2.1.x
For Tomcat users:
Struts 2 uses JCL i.e. Java Commons Logging which basically enables
users plugging any existing concrete Logging implementation e.g. Log4J
or Java JDK Logging. Therefore Struts 2 running in Tomcat (that also
uses JCL) will inherit (Runtime class loading search see JCL) whatever
logging implementation Tomcat was configured to use, by default Tomcat
uses Java Logging.
Therefore in the default Tomcat installation and in order to avoid the
many WARN logging coming from Struts 2.1.x you only need to modify the
Tomcat configuration in:
$CATALINA_BASE/conf/logging.properties
changing the default category of INFO or WARN to a higher value e.g.
SEVERE you will avoid all those WARN messages from Struts 2.
PLEASE NOTE:
In Tomcat versions before the latest 6.0.16 there seemed to be a bug in
the $CATALINA_HOME/bin/catalina.sh
There was a mistake specifying the location of the logging
configuration, that resulted in the default configuration being ignored
in cases when CATALINA_HOME <> CATALINA_BASE. If you are stuck to
whatever Tomcat version before 6.0.16 try looking for this snippet in
catalina.sh and making sure that $CATALINA_BASE is the one used rather
than $CATALINA_HOME (they might not be necessarily the same):
# Set juli LogManager if it is present
if [ -r "$CATALINA_BASE"/conf/logging.properties ]; then
JAVA_OPTS="$JAVA_OPTS
"-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
"-Djava.util.logging.config.file="$CATALINA_BASE/conf/logging.properties"
fi
To non Tomcat users:
Try looking among the jars that are actually loaded by your Web Server
whatever they are e.g. if you find log4j*.jar then you know you want to
find that log4j.xml or log4j.properties and change the category there
higher than WARN.
HTH,
regards,
Giovanni
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