On a linux box where I ran this after running post_install (which seemed to run OK), I do not have $JAVA_HOME set:
.....ducc_runtime/admin$ echo $JAVA_HOME <gives an empty line as an answer> Running the sign_jconsole_jar command says it thinks java-home is /usr, and then it fails to find the file /usr/lib/jconsole.jar -Marshall
