Friday, August 8, 2014

Setting up debug mode in Maven

Maven invoked the JRE for running. So pass the debug parameters to MAVEN_OPTS in the environment.
MAVEN_OPTS=-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=3998,suspend=n,server=y -Xms256m -Xmx512m -XX:MaxPermSize=128m
With the option set in the cmd/shell, the process spits the debug information at socket 3998. This can be attached from the development environment like eclipse. The Xms, Xmx and XX:MaxPermSize parameter are memory parameters and you can ignore them if you are fine with the defaults.

These are in fact standard Java debugging options and nothing maven about it.
Option Details:

  • address - Address of the port where you can attach the debugger
  • suspend - Making it 'y' will suspend the java runtime and will wait fora client to listen to the socket for debugging information. Making it n does not suspends the server and will let the debugger to be attached at any time.

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