apache/spark — pull request #2904 by sarutak (2014-10-23 05:55:07+00:00)
Title: [SPARK-4057] Use -agentlib instead of -Xdebug in sbt-launch-lib.bash for debugging 

In -launch-lib.bash, -Xdebug option is used for debugging. We should use -agentlib option for Java 6+.