Alternative to CLASSPATH for ecs-logging-core.jar and jul-ecs-formatter.jar with Tomcat

Tomcat 9.0.52
Java openjdk version "1.8.0_302"

As per the suggestion (Get started | ECS Logging Java Reference [1.x] | Elastic) I have been successfully using ecs-logging-core.jar and jul-ecs-formatter.jar by adding them to the CLASSPATH environment variable in tomcat/bin/

export CLASSPATH="$CLASSPATH:/usr/local/tomcat/bin/ecs-logging-core.jar:/usr/local/tomcat/bin/jul-ecs-formatter.jar"

With the appropriate configuration the Tomcat logs are produced in JSON format.

However, due to various reasons with the way we deploy Tomcat applications, I would like to move away from referencing these jars in the CLASSPATH environment variable.

I have tried various alternate configurations, putting the jars in lib/, adding them to common.loader in conf/, and so on. But nothing else seems to work, i.e. the logs are no longer produced in JSON format.

My question - Is adding these two jars to the Java CLASSPATH environment variable the only way to get these to be recognized by Tomcat?


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