QUICK on UNIX - Session Hang after Network Cutoff

Abd Ghani Abdullah abdghani at staroba.org
Thu Jan 31 03:30:03 CST 2008



   Dear all,

   I have a customer who is having problem with QUICK via Reflection
remote connection. While QUICK is in session, the connection is lost
and quick   processes appear to be continually trying to read() from
a pty which has no underlying telnet connection active any longer.
The code path they enter when the pty is in this state causes all to
be woken at once.

   The system has so many 'quick' processes (depending on the number
of sites connecting and lost connection) in this state that they are
all waking/sleeping together and causing lots of extra CPU time in
the scheduling related kernel code paths.

   Powerhouse Version:  8.43.D1
UNIX Version: HP-UX 11.2

   Appreciate any input.

   Thanks & regards,

   Ghani.

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