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How to get pid of child java processes

akshay_n_s
akshay_n_s asked
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Last Modified: 2008-01-09
Hi

I am working on jdk 1.3, sun solaris OS....

I use a shell script (using 'nohup') to fork a Java process, which in turn forks more than 2 java processes. I want to get pids of all newly generated child process.

My application has a behaviour that child processes terminate after completing their jobs...And parent Java process forks the child processes again whenever required...

So, everytime I want fresh pids of the child processes

Note: After executing the shell script (in background), I use to close the terminal window.

-------------------------

Actually I want to kill child processes automatically, if I parent Java process found them hang for some reason. I know that 'Process' class has a functionality to kill the child processes, but I found that many times it gets fail due to unknown reasons. So, I want to kill such child processes using a 'kill -9' command using shell script...
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There's no platform oriented service like this in JAVA.
You must tether (spawn with input and output controlled) ps to find out your PID and that of the children.
Then spawn 'kill'.

;JOOP!

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Top Expert 2006

Commented:
Why are you forking the JVM process ?
Java has eased concurrent programming by introducing Threads

Author

Commented:
Threads have their limitations, like if any one of them fails then it may cause others to get failed...
That may be true but you can program against that.

;JOOP!

Author

Commented:
Actually an api that I am using for a CRM software is not thread safe...thats why...
I insist that 'ps' should be spawned to find out the PID of any process.
The processes can be 'identified' by their commandline (using "ps -f" or "ps -ef").

;JOOP!
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