topic Re: Kill a process in Operating System - HP-UX

Kill a process

M. Tariq Ayub — Mon, 21 Jul 2003 10:42:01 GMT

Hi,

I am trying to kill a process by kill -9. but it is not terminating. I have also tried from SAM.

Any help?

Re: Kill a process

Pete Randall — Mon, 21 Jul 2003 10:43:59 GMT

This happens when a process is waiting for something like completion of an I/O request. It won't process the kill signal until it receives the answer to it's I/O request. If kill -9 won't do it, the only simple answer is to reboot.

Pete

Re: Kill a process

Steven E. Protter — Mon, 21 Jul 2003 10:44:57 GMT

By now the process is probably a zombie. Usually only booting will fix that.
ps -ef | grep defunct
# finds zombies

ps -ef | grep

If the PPID is 1 you can't kill it because process 1 is the whole machine.

If the PPID is not 1, you can wait or try again.

Also:

export UNIX95=1

ps -efH | grep

This indents to show children and is useful in diagnosis.

SEP

Re: Kill a process

Fragon — Mon, 21 Jul 2003 10:45:06 GMT

Hi,
For safety reason,some process can't be killed even with -9 option! For example, mediainit tool!

-ux

Re: Kill a process

M. Tariq Ayub — Mon, 21 Jul 2003 10:47:20 GMT

ITS PPID is 1

Re: Kill a process

Abskhan — Mon, 21 Jul 2003 12:56:53 GMT

please dont kill it then.You will bring down the machine !!!!!!!!!!!!!!!!!!!!

Re: Kill a process

doug mielke — Mon, 21 Jul 2003 12:57:18 GMT

ppid of 1, init, mother of all processes.
It could have become orphaned if it's parent died, and only a parent can kill a child.
If parent dies, then init will adopt, and try to manage it.
It really doesn't matter tho, if kill -9 wont kill it, no kill will.
Other then reboot, which brings with it it's own risks and challenges with a hung process, you can try to find the system event that the process is waiting for, and satisfy it, or 'abort' the request. (i.e., if hung accessing the tape drive, turn the tape off, to see if the process stops waiting.

Re: Kill a process

Abskhan — Mon, 21 Jul 2003 12:59:48 GMT

sorry about my earlier posting. I read the your posting as PID 1.
When PPID is 1 , it means that it is an orphan process.YOu can try killing with kill -9 .

Re: Kill a process

Pete Randall — Mon, 21 Jul 2003 13:08:47 GMT

A PPID of 1 indicates either an orphan or a zombie process. Once again, the only reasonable solution is to re-boot your machine, as the only way to kill one of these processes is to kill the parent and you certainly don't want to kill init!

Pete

Re: Kill a process

Caesar_3 — Mon, 21 Jul 2003 20:00:45 GMT

Hello!

There is no way to kill zombie process
so the only you can do is to reboot the system.

Caesar

Re: Kill a process

M. Tariq Ayub — Tue, 22 Jul 2003 01:54:45 GMT

Ok i will give a reboot to the system. as it is the only safe way. Thanks a lot guys.