[jboss-jira] [JBoss JIRA] Commented: (JBAS-3748) give run.sh the ability to run the VM in background and export the PID as an env. var.
[ http://jira.jboss.com/jira/browse/JBAS-3748?page=comments#action_12344900 ]
Dimitris Andreadis commented on JBAS-3748:
------------------------------------------
Thanks a bunch Ian. The final modifications to the script are shown below:
Basically it assumes the default behaviour, unless JBOSS_ENDORSED_DIRS is set. In that
case, it'll start and wait for jboss in the background, relaying most signals.
The net result is if the parent process (run.sh) is stopped, jboss will be stopped too. So
whoever starts run.sh (init script or whatever) needs only to deal with the run.sh PID,
not the jboss one.
while [ true ]; do
if [ "x$LAUNCH_JBOSS_IN_BACKGROUND" = "x" ]; then
# Execute the JVM in the foreground
"$JAVA" $JAVA_OPTS \
-Djava.endorsed.dirs="$JBOSS_ENDORSED_DIRS" \
-classpath "$JBOSS_CLASSPATH" \
org.jboss.Main "$@"
JBOSS_STATUS=$?
else
# Execute the JVM in the background
"$JAVA" $JAVA_OPTS \
-Djava.endorsed.dirs="$JBOSS_ENDORSED_DIRS" \
-classpath "$JBOSS_CLASSPATH" \
org.jboss.Main "$@" &
JBOSS_PID=$!
# Trap common signals and relay them to the jboss process
trap "kill -HUP $JBOSS_PID" HUP
trap "kill -TERM $JBOSS_PID" INT
trap "kill -QUIT $JBOSS_PID" QUIT
trap "kill -PIPE $JBOSS_PID" PIPE
trap "kill -TERM $JBOSS_PID" TERM
# Wait until the background process exits
WAIT_STATUS=0
while [ "$WAIT_STATUS" -ne 127 ]; do
JBOSS_STATUS=$WAIT_STATUS
wait $JBOSS_PID 2>/dev/null
WAIT_STATUS=$?
done
fi
# If restart doesn't work, check you are running JBossAS 4.0.4+
# http://jira.jboss.com/jira/browse/JBAS-2483
# or the following if you're running Red Hat 7.0
# http://developer.java.sun.com/developer/bugParade/bugs/4465334.html
if [ $JBOSS_STATUS -eq 10 ]; then
echo "Restarting JBoss..."
else
exit $JBOSS_STATUS
fi
done
give run.sh the ability to run the VM in background and export the
PID as an env. var.
--------------------------------------------------------------------------------------
Key: JBAS-3748
URL: http://jira.jboss.com/jira/browse/JBAS-3748
Project: JBoss Application Server
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Affects Versions: JBossAS-4.0.5.CR1
Reporter: John Mazzitelli
Assigned To: Dimitris Andreadis
Fix For: JBossAS-4.0.5.GA
Attachments: patch-pidfile.txt, patch.txt, run.sh.patch
I want to write an init.d script with the typical start - stop options to start JBossAS.
I want to use the method of writing a pid file when started and killing the pid found in
the file when stopping.
I do not want to use the "normal" shutdown mechanism to stop it because that
assumes the JBoss instance has exposed its remote MBean interface (and I do not want to
assume that). Plus, I want to ensure it is killed, and using the "kill" command
is as fool-proof as I need it to be.
I also want to be able to use run.sh to start the instance (I do not want to have to do
all the work run.sh does - setting up the JVM, passing in arguments, worrying about all
the cygwin - darwin things, etc. etc.).
But, if my init.d script starts run.sh, I cannot use $! in my init.d script as the pid
file contents because $! is the pid of run.sh script process. It is NOT the pid of the
JBoss JVM instance itself. If I then go to kill the run.sh process, it dies, but the JVM
process does not. Therefore, the init.d stop option does not work - it cannot stop the
JBoss VM.
I would like to propose to make the following change to run.sh that would facilitate
this. This change is backwards compatible. What this change does is - if I set the
environment variable "LAUNCH_JBOSS_IN_BACKGROUND" and source run.sh, run.sh will
export JBOSS_PID as the pid value of the JVM process. My init.d script (the thing that
sources run.sh) will be able to write JBOSS_PID anywhere I want and thus later be able to
use it to kill the JBoss VM.
See attached patch for the change.
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