By default, dbx starts the JVM software in your path if you do not specify a path name for the JVM software.
To specify a path name for the JVM software, set the jvm_invocation environment variable to the appropriate path name, as shown in the following example.
jvm_invocation="/myjava/java -Xdebug"
This setting causes dbx to start the JVM software as follows:
/myjava/java –agentlib:dbx_agent=sync