Shell Programming and Scripting

I have an application that uses java but when the application stops, sometimes, for some odd reason, it leaves java threads behind. When the application next starts, it doesn't behave properly because of these previous java processes

What I want to do is create a script to check for these java threads/processes and if they exist, delete them....if they don't exist, do nothing

Please bare-in-mind that from a unix scripting point-of-view I'm a complete novice but here's what I've got so far:

Code:

if [ps -ef | grep -v 'grep' | grep java' -gt 0];
then
kill -9 `ps -ef | grep -v 'grep' | grep java |awk '{print $2}'`
fi

...what do you think, will this achieve what I want it to do?

Any advice / guidance would be gratefully received
Thanks
David

(I'm not going to attempt a solution here because there is never a reason to routinely issue "kill -9" unless the correct signals have failed).

To keep the thread moving, some base questions.

Are you still using Solaris 10 ?
What Shell are you using?
Without automation does killing each process which mentions "java" clear the problem? Does the server crash eventually?
When there is not a problem, are there ever any "java" processes running?

Hi Methyl

Sorry for the delay. After bouncing the server and starting the databases, everthing looked OK however the problem is now back.

In answer to your queries:
- I am using solaris 10
- I think its bourne shell that's being used

- There is a cronjob that should shutdown the java threads every night as part of the database shutdown & backup routine

The server hasn't crashed - why would it ?

The java threads are required as part of the application so they should always be present.

If I wasn't to use kill -9, is there a softer kill command I should be using to shutdown any rogue java threads ?

Any advise would be gratefully received