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Set up remote debugging for Tomcat in Docker
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docker-tomcat_remote-debugging.adoc

Set up remote debugging in dockerized Tomcat

Start Container, stock tomcat 8.5 in this example
$  docker run \
    -eJPDA_OPTS="-agentlib:jdwp=transport=dt_socket,address=5005,server=y,suspend=n" \
    -p8080:8080 \
    -p5005:5005 \
    tomcat:8.5-jdk8 \
    catalina.sh jpda run

In IntelliJ, add a launch configuration w/ the following properties:

  • Template: Remote

  • Debugger Mode: Attach to remote JVM

  • Host: localhost

  • Port: 5005

  • Commandline Arguments for remote JVM: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

Configuration in other debuggers/IDEs is basically the same.

Once the container is running, set a breakpoint / exception breakpoint & start the new launch configuration. The container now suspends once the breakpoint is hit & the stack is visible in your IDE.

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