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тАО05-09-2007 06:31 AM
тАО05-09-2007 06:31 AM
Can't kill non existent process
A $show user shows the process but a stop/id will not remove it. I found a tool called forcex and tried that but it said the process did not exist. The operators start trying to log in and out and in and out and we end up with several of these zombie like processes all in rwmbx state along with many other processes in that state. I never get called until they have hosed it as thoroughly as possible and the mill is about to shut down. At that point, there is little time for troubleshooting just screams from the mill about possible production losses and cries of "Reboot, Reboot".
I have the document for troubleshooting process in rwmbx but never enough time to go through all the processes to find a culprit. Any suggestions on how to delete these processes when they occur? I am not sure what state these processes or non processes or really in and whether the doc would help anyway.
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тАО05-09-2007 06:38 AM
тАО05-09-2007 06:38 AM
Re: Can't kill non existent process
Jur.
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тАО05-09-2007 06:56 AM
тАО05-09-2007 06:56 AM
Re: Can't kill non existent process
What I usually recommend for these situations is to post explicit details on properly performing a system crash sequence directly onto or immediately near the console terminal, and I configure the system to ensure that a valid crashdump is logged into the system dump file.
There can be various causes, and usually involving a stuffed-up mailbox somewhere. As this is a production environment, suggestions around reviewing and then modifying the application code to better detect and report (or detect and avoid) these cases may or may not be feasible. This assumes these mailboxes are yours, and not something underneath the database.
Information on Resource Waits and on RWMBX states can be found in various spots; I've posted up the following related articles a while back:
http://64.223.189.234/node/231
http://64.223.189.234/node/250
Stephen Hoffman
HoffmanLabs LLC
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тАО05-09-2007 07:00 AM
тАО05-09-2007 07:00 AM
Re: Can't kill non existent process
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тАО05-09-2007 08:32 AM
тАО05-09-2007 08:32 AM
Re: Can't kill non existent process
clear the mailboxes. I've cleared a backlog
of processes piled up on one process in rwmbx. I'd find the mbx(s) and what they want with sda, eg if needs a read in dcl
$ open/read xx mbaxxx
$ read xx foo
another might need a write,
do until the process you did the stop/id
disappears. I'd definitly get the crash
and get the problem fixed if you can though.
if its safe, this might keep the mill from
screaming at you.
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тАО05-09-2007 09:11 AM
тАО05-09-2007 09:11 AM