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
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