[IBMiOSS] Start ActiveMQ from CL

I'm having trouble running ActiveMQ from a CL command. It starts and runs fine, but the PID is blank. The blank PID prevents me from stopping ActiveMQ. I don't have this problem when I start ActiveMQ from a shell.

From a shell:

-bash-4.4$ /QOpenSys/pkgs/bin/activemq start
INFO: Loading '/QOpenSys/pkgs/lib/activemq/bin/env'
INFO: Using java '/QOpenSys/usr/bin/java'
INFO: Starting - inspect logfiles specified in logging.properties and log4j.properties to get details
INFO: pidfile created : '/QOpenSys/pkgs/lib/activemq/data/activemq.pid' (pid '38926')
-bash-4.4$

From CL the output is exactly the same except for line with the PID:

INFO: pidfile created : '/QOpenSys/pkgs/lib/activemq/data/activemq.pid' (pid '')

Here's the CL command (using the IBM recommended method to run a PASE program):
QSH CMD('/QOpenSys/usr/bin/sh -c "/QOpenSys/pkgs/bin/activemq start"')


Anyone have any suggestions?

TIA