run.sh can consume 100% single CPU resources on Solaris

When shutting down jboss the run.sh script remain alive and consumes 100% of a single CPUs resources. run.sh needs to be killed off.

To trigger the bug, you need to

1) set LAUNCH_JBOSS_IN_BACKGROUND
2) start the jboss server normally
3) Once it's started stop the server

At this point the JVM stops, however the run.sh script remains running consuming 100% of a single CPUs resources.

The problem seems to be this bit of script, plus the fact that the script shebang is #!/bin/sh

while [ "$WAIT_STATUS" -ne 127 ]; do
JBOSS_STATUS=$WAIT_STATUS
wait $JBOSS_PID 2>/dev/null
WAIT_STATUS=$?
done

On Solaris, /bin/sh is real bourne shell and the wait shell-built-in for /bin/sh on Solaris returns 0 (not 127) if the PID (passed as an argument) doesn't exist. The man page for wait states that this is the correct behaviour. Therefore wait returns 0 and the while loop continues forever burning up CPU resources (until you kill it with one of the signals not being trapped).

Here's a link to the patch that may have introduced the bug.
http://jira.jboss.com/jira/browse/JBAS-3748