ActiveMQ execution failing on IBM i - activemq

Question

Has anyone installed/run ActiveMQ on IBM i and can help me with this?
Either the process does not run or gives ZipException.
I downloaded ActiveMQ 5.16.2 from ActiveMQ 5.16.2 (Apr 28, 2021) - Unix/Linux/Cygwin bundle
for installing on IBMi V7R3 and followed the official steps for installation mentioned on Version 5 Getting Started - 'Installation Procedure for Unix' section.
This is similar to installing on IBMi as mentioned in - Installing activeMQ on IBM i5 V5R4
On running the command ./bin/activemq start, the process starts but ends without actually running ActiveMq.
It shows below error on the console -
./bin/activemq: 001-0019 Error found searching for command whoami. No such path or directory.
Also the command ./bin/activemq status returns ActiveMQ not running .
When running the command ./bin/activemq console, the process starts but gives the same whoami error and ends with ZipException.
On Windows, I have been able to install and run successfully.
Has anyone installed ActiveMQ on IBMi and can help me with this?

Answer 1

You are missing the command
whoami
This is not a shell built-in, so you would need to add that package to your installation.
h/t to #nfgl for the pointer to the IBM OSS rpm repo. If you inspect their src.rpm, you'll see they patch the activemq script. Worth reviewing
SRC RPM calls for this dependency: coreutils-gnu
IBM iSeries Patch of bin/activemq:
$ more activemq-activemq.patch
--- a/bin/activemq 2020-03-30 18:50:50.000000000 +0000
+++ b/bin/activemq 2020-03-30 18:57:03.000000000 +0000
## -336,10 +336,14 ##
-Dactivemq.data=\"${ACTIVEMQ_DATA}\" \
$ACTIVEMQ_CYGWIN \
-jar \"${ACTIVEMQ_HOME}/bin/activemq.jar\" $COMMANDLINE_ARGS >> $ACTIVEMQ_OUT 2>&1 &
- RET=\"\$?\"; APID=\"\$!\";
- echo \$APID > "${PIDFILE}";
- echo \"INFO: pidfile created : '${PIDFILE}' (pid '\$APID')\";exit \$RET" $DOIT_POSTFIX
- RET="$?"
+ exit \"\$?\"" $DOIT_POSTFIX
+ RET="$?"
+ sleep 5
+ OS400_PID=`ps | grep -iE 'java|jFromPASE|jvmStartPase|qp0zspwp' | grep -v '\spgm-' | grep -vE '^\s+1\s' | tail -n 1 | awk '{print $1}'`
+ rm -f $PIDFILE
+ qsh -c "/usr/bin/touch -C 1208 $PIDFILE"
+ echo $OS400_PID > $PIDFILE
+ echo "INFO: pidfile created : '$PIDFILE' (pid '$OS400_PID')"
elif [ -n "$TASK_TODO" ] && [ "$TASK_TODO" = "stop" ];then
SPID="`cat "${PIDFILE}"`"
$EXEC_OPTION $DOIT_PREFIX "\"$JAVACMD\" $ACTIVEMQ_OPTS $ACTIVEMQ_DEBUG_OPTS \
## -384,7 +388,7 ##
return 2
fi
ACTIVEMQ_PID="`cat ${ACTIVEMQ_PIDFILE}`"
- RET="`ps -p "${ACTIVEMQ_PID}"|grep java`"
+ RET=`/QOpenSys/usr/bin/ps -p ${ACTIVEMQ_PID}|grep -iE 'java|jFromPASE|jvmStartPase'`
if [ -n "$RET" ];then
return 0;
else
## -403,7 +407,7 ##
return 2
fi
THEPID=`cat ${PID_STOP}`
- RET=`ps -p $THEPID|grep java`
+ RET=`/QOpenSys/usr/bin/ps -p ${ACTIVEMQ_PID}|grep -iE 'java|jFromPASE|jvmStartPase'`
if [ -n "$RET" ];then
return 0;
else