HP3000-L Archives

July 2001, Week 2

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
Tracy Johnson <[log in to unmask]>
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Date:
Tue, 10 Jul 2001 17:42:09 -0400
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As you recall, we left our heroes pending another
START NORECOVERY to see if it would wake up the
NM Spoolers and the Gateway.

Nope.

Sometime afterwards, the HP calls with another
solution to the dilemma.  A Beta Patch that changes
the way UDP behaves.

Seems UDP is single-threaded on the HPe3000.  The
Spoolers are SNMP, which by some process that I
can only call magic, works under UDP.  From what
I was told, UDP will wait interminably long before
it will time out, thus in turn, hold up the spool
queues.  (This implies something out there is
making UDP, ... wait.)

The beta patch that HP is providing, will either
do one of two things:

1)  UDP will become multi-threaded, like TCP and
start spawning separate processes or,

2)  UDP will become tweaked so that the time-out
for it will not be so long.

(Note there is nothing in NMMGR that affects how
long UDP waits for a time out.  So there is nothing
that can be self-corrected there.)

Getting the patch is another story.  HPRC Atlanta
is shipping it out tonight via (unnamed carrier)
and I'll retrieve the patch at (undisclosed airport)
this evening and apply the patch ASAP.

HP says that this obviously does not fix the problem,
regarding the spooler, but rather this is a work-around
that will allow UDP to pick itself up and keep going
when it stumbles.  The underlying cause that is making
it stumble is not addressed.

It is assumed something on the network has changed
for this gateway, but it is not yet determined
what it is.  The circuit and router is maintained
by a vendor who denies any changes.

--
BT
NNNN
Tracy Johnson

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