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Re: My process wedges the machine.



Hi Dave,

Thanx for your time.
Ya, its a C++ aplication. I am sure it is not forking any child.
It is not waiting, infact it is consuming lots of CPU time.

Regards,
Umesh

"Webster, Dave/RMD" wrote:
> 
> Hi Umesh,
> 
> I've had similar problems when a process is waiting for children
> it swaned/forked off to finish, and those children hang.  Can you
> check for children of the main, 'wedged' process ('pstree' or similar)?
> Although I would have assumed it's state wouldn't be running if
> it was waiting for a child to die.  Also, are you sure it's the main
> processes that's 'wedged', and not a forked child of it?
> 
> Cannot you kill the process with kill, kill -1, kill -14 or kill -9?
> I've not heard of too many non-zombie processess impervious to
> the kill -9 from root?  Maybe you don't have correct permissions?
> 
> If you've tried gdb-ing to it, it's probably a C/C++ app, not Java,
> eh?  Maybe you're conditionally forking off a child process, or
> making a db connection isn't closing and your app. is patiently
> waiting.
> 
> Hmmm, just some random guesses.  Sorry.
> 
> p.s. I've not heard the phrase 'wedged' applied to knackered
> programs before.  Cool, a new term to fob annoying clients off
> with ("Sorry Gale, the program is wedged until Thursday.").
> 
> -d.w.
> :-)
> 
> 
>         -----Original Message-----
>         From: Umesh Sisodia [mailto:usisodia@xxxxxxxxxxx]
>         Sent: Tue 20/05/2003 12:36
>         To: redhat-devel-list@xxxxxxxxxx
>         Cc:
>         Subject: My process wedges the machine.
> 
> 
> 
>         Hi
> 
>         We have recently ported our tools to Red hat linux.
>         In one of our application we are facing the problem that it wedges
>         the machine. Log file shows that process has completed its job, but
>         then machine almost hangs.
> 
>         -Process cannot be killed.
>         -process is in run state (not waiting on I/O)
>         -process run time keeps incrementing endlessly.
>         -process memory size is low (41MB)
>         -gdb cannot attach to the process.
> 
>         This does not happen in every run, but happens randomly once in a
>         while. The machine is IBM with 1xCPU (Xeon 2.4MHz) 4GB RAM running
>         the RH7.3 BigMem kernel.
>         Regards,
>         Umesh
> 
> 
>         --
>         ******************************************************
>         Umesh Sisodia (Sr. Member of technical staff)
>         Cadence Design Systems, NEPZ, Noida, India
>         Ph: (off) 91-120-2562842, ext. 4298
>         (mobile) 98112 04168, (Res) 91-120-2578734
>         email : usisodia@xxxxxxxxxxx
>         ******************************************************
> 
> 
>         _______________________________________________
>         Redhat-devel-list mailing list
>         Redhat-devel-list@xxxxxxxxxx
>         https://www.redhat.com/mailman/listinfo/redhat-devel-list
> 
> 
>   ------------------------------------------------------------------------
>                   Name: winmail.dat
>    winmail.dat    Type: application/ms-tnef
>               Encoding: base64

-- 
******************************************************
Umesh Sisodia (Sr. Member of technical staff) 
Cadence Design Systems, NEPZ, Noida, India
Ph: (off) 91-120-2562842, ext. 4298 
(mobile) 98112 04168, (Res) 91-120-2578734 
email : usisodia@xxxxxxxxxxx
******************************************************


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