Zombie process using CPU

Ike Panhc ike.pan at canonical.com
Tue Apr 20 05:27:10 UTC 2010


IIRC zombie process is waiting for his parent process to end him.

If I see an zombie process, I will use "pstree" to find his parent
process and see what I can do. Maybe kill the parent process.

Hope its helpful.

John Tapsell wrote:
> Hi,
>   After a program (vuze) crashed I ended up in the situation of having
> a process, java, using 100% CPU of a core while also being a zombie.
>   Looking in /proc/<pid>/task  I saw two pids - the main task and a
> subtask.  The main task (cat /proc/<pid>/task/<pid>/status ) was
> indeed a zombie, but the subtask was still running and using CPU.
>   I could not find any way to kill this process. kill -9  on the <pid>
>  and on the pid on the subtask did nothing.  In the end I had to
> reboot.
>   is this situation supposed to be possible?  How do I kill a subtask?
> John

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