[jboss-jira] [JBoss JIRA] Updated: (JBAS-3748) give run.sh the ability to run the VM in background and export the PID as an env. var.

[John Mazzitelli (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBAS-3748?page=all ]

John Mazzitelli updated JBAS-3748:
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    Attachment: patch-pidfile.txt

I've attached a newer patch that can be used instead.  I checks the value of that LAUNCH_JBOSS_IN_BACKGROUND variable and if its value is not "nofile", the it will be assumed to be full file path to the pid file that run.sh should created.  That file will contain the pid of the JBoss VM process.  This way, a user can either source run.sh OR directly execute run.sh (so long as the caller provides a file that the pid can be stored in).

> 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
>
>
> 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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