Externalizing Log4j2 Not Working on Cas 4.2.1

[Matt S.]

Hi,

On Cas server 4.2.1, it doesn't seem to be using the property in cas.properties for externalizing the log4j2.xml file.

This was working in 4.1.x, for example setting log4j.config.location=file:///etc/cas/log4j2.xml in an externalized cas.properties file, but it doesn't seem to be picking it up in 4.2 as none of the log files are being created.

If I just copy the log4j2.xml into my overlay in WEB-INF/classes/, it does seem to work, but at least that is expected since it's the default location.

I also noticed that in the sample Overlay linked in documentation, the cas.properties file does not contain any property related to the log4j2 file.

Is there a different way this is supposed to be setup to externalize?

The logging section of the documentation only mentions a Java virtual machine argument to define log4j.configurationFile for externalization.

I also tried using a property name of "log4j.configurationFile" in cas.properties but that didn't seem to work.

Any suggestions?

Thanks,
Matt

[Misagh Moayyed]

See http://jasig.github.io/cas/4.2.x/installation/Logging.html#configuration

 

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[Dmitriy Kopylenko]

Yes, as indicated in the doc that Misagh referenced, the ‘log4j.configurationFile’ is a system level JVM property that is not set in your cas.properties file. This is the change in 4.2+. You’d need to explicitly pass this system property to your JVM runtime with -D prefix. Here’s for example an excerpt from Tomcat server’s (where cas.war is deployed) setenv.sh that sets those system properties:

#CAS logging settings
export JAVA_OPTS="$JAVA_OPTS -Dlog4j.configurationFile=/etc/cas/log4j2.xml -DloggerFactory=org.apache.logging.slf4j.Log4jLoggerFactory”

Best,

D.

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[Matt S.]

Thanks, Dmitriy.  That makes sense.

The only issue now is that Tomcat doesn't seem to be using the "setenv.sh" script.  From what I've found, this seems to be because we are using the tomcat 7 server from the yum repo on Centos 7 as opposed to the manually downloaded version of the server, so there was no startup scripts or setenv.sh script, but I tried to create setenv.sh in the Tomcat home/bin directory.

I haven't found anything yet regarding how to tell Tomcat to use setenv.sh.  Is there another way to set this in Tomcat?

Thanks,
Matt

[Misagh Moayyed]

startup.sh or catalina.sh will do.

 

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[Dmitriy Kopylenko]

Yes that, and also Tomcat SHOULD automatically pick up $TC_HOME/bin/setenv.sh

D.

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[Chris Peck]

Or, follow these directions:

https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-7-on-centos-7-via-yum

Which basically says to edit /usr/share/tomcat/conf/tomcat.conf

-c

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[Matt S.]

Thanks all!  That seems to work using tomcat.conf.

I was hoping to do it similarly in tomcat.conf by adding a section just for the CAS logging options instead of appending the properties an already long string of options, since the value of "JAVA_OPTS" can grow and get pretty long if many options are defined.

Thanks,
Matt

[Bryce Nordgren]

I've been fighting this same battle today, also on Centos 7 with tomcat installed via yum.

My issue is that I can't find cas.log anywhere. I can "journalctl -u tomcat" to see the output, but I can't find the file. Where is it putting your cas.log?

Bryce