topic Re: Can't kill the process in Operating System - HP-UX

Can't kill the process

peterchu — Mon, 06 Sep 2004 03:47:14 GMT

I found that there are process can't be kill even I use "kill -9 pid" , except reboot the system , how can I kill it ? thx.

Re: Can't kill the process

Steve Steel — Mon, 06 Sep 2004 03:58:28 GMT

Hi

Unfortunately you answered your own question.

A process needs to detect a signal to react
to it. Cases like zombies and processes in states like non reenterant io will never see the signal and can only be killed by a reboot.

Sometimes using ndd to change timers can enable you to shorten waits and thus allow a process stuck on somthing like a tcp socket to exit itself.

Steve Steel

Re: Can't kill the process

Fred Ruffet — Mon, 06 Sep 2004 03:59:12 GMT

You probably can't. If a process is not dying after kill -9, it's probably waiting on a blocking I/O. This kind of process will only disappear with a reboot. They are a real problem when executing themselves in a filesystem you want to unmount...

Regards,

Fred

Re: Can't kill the process

G. Vrijhoeven — Mon, 06 Sep 2004 04:01:59 GMT

Hi,

Killing its PPID could help sometimes, but if this does not work, the only solution is a reboot.

In most of the cases a process is in kernel mode when you are not able to kill it. In this situation it coult be hung becouse it is trying to access a device that is not available/defect. Solving this problem could enable the kill command to reach the process.

HTH,

Gideon

Re: Can't kill the process

Franky_1 — Mon, 06 Sep 2004 04:04:25 GMT

Hi,

if a process can't be killed even using "kill -9" there's unfortunately no other optin than rebooting the server :-(

Regards

Franky

Re: Can't kill the process

T G Manikandan — Mon, 06 Sep 2004 04:18:56 GMT

Use truss sort of tools to find the state of the process.

Zombie processes cannot be killed.

Do not kill processes with PPID 1.you are gone!!

Re: Can't kill the process

G. Vrijhoeven — Mon, 06 Sep 2004 04:21:28 GMT

Hi,

Thanks for the correction!
(killing ppid 1 )

Regards,

Gideon

Re: Can't kill the process

presage112 — Mon, 06 Sep 2004 09:45:27 GMT

I guess you can remove the sahred memory on that process ,using "ipcs" command ,then "ipcrm" command.

Re: Can't kill the process

Muthukumar_5 — Mon, 06 Sep 2004 11:03:32 GMT

Process which can not be killed with kill -9 called as Zombie. It will be removed from system after reboot only.

There is a possibility as "when ever it's PPID is 1 then it will be removed with in few times " Else Try to remove new PPID so that it's PPID will reach to 1...

By normal, it will be removed on reboot only.
A discussion will give more information as,
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=686510