Ismet --

You should be able to send a mupip interrupt to the hung process and get 
it to dump its current state.

If it is in a tight loop, it should be burning CPU cycles, and should 
show up under "top"

By "corruption" I think Greg means inconsistent data from an application 
perspective.  If there is reason to suspect database structural 
integrity, a mupip integ can be used to test for structural integrity.

Also, is an M lock deadlock ruled out?  lke with a show -all -wait will 
tell you about locks owned by processes and processes waiting for those 
locks.

Regards
-- Bhaskar

Greg Woodhouse wrote:
> If you can replicate the problem, I'd recommed signing in through ^ZU
> and interrupting the process with kill -2. I don't know if ctrl-C will
> even send an interrupt, it might just break the connection.
> 
> Look at the option definition and see if there is any code vulnerable
> tyo being put into a tight loop if certain variables are dedfined in
> your environment. Finally, and this is a long shot, it's just possible
> that a corruption of some sort in ^XUTL has caused a node to point back
> to itself. (Note, BTW, that data in ^XUTL is stored under the user's
> DUZ. Did you sign in as the same user each time?)

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