uninteruptable process weirdness

From: Richard A. Muirden <richard_at_rmit.edu.au>
Date: Tue, 31 Jan 1995 19:15:17 +1100 (EDT)

Hi managers,

OSF/1 V3.0B (358.78) though saw the same thing under V3.0 (347):

On our AlphaServer 2100 4/200, after some days uptime processes decide
to go into U (un-interuptable) mode, and can't be killed. This has a nasty
side effect that it seems to happen to wall, so:

a) can't wall to people, it just hangs after accepting the message
b) stuffs up shutdown, which waits for wall to terminate, which doesn't,
   so you can't easily do a clean shutdown of the machine, let alone
   warn the users

However after a reboot the system is fine, and wall is fine and there
isn't any weirdness.. It only seems to happen after a few days uptime.
Permissions seem normal enough - can't figure it out.

Also we see a large number of defunct processes... is this normal
or another quirk?

Should I call this in to DEC as a software bug, or is it 'known' ? it
seems kind of hard to prove...

-richard

-- 
Richard A. Muirden, Sys. Admin |Fan of Shostakovich, "Star Trek" and the Boeing
Mailto: richard_at_rmit.EDU.AU    |777 (launch: May 15, 1995 - United Airlines).  
Phone: (+61 3) 660 3814        |I created alt.fan.shostakovich! Fly: UA,QF,WN
http://www.rmit.edu.au/richard |Can *YOU* beat my 105 Shost CD's? :-)
  * 1995: Remembering 20 years since the death of Shostakovich (1906-75) *
Received on Tue Jan 31 1995 - 03:15:42 NZDT

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