Article: Q171950
Product(s): Microsoft SNA Server
Version(s): WINDOWS:3.0 SP1
Operating System(s):
Keyword(s): kbnetwork kbprint
Last Modified: 07-SEP-2001
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The information in this article applies to:
- Microsoft SNA Server, version 3.0 SP1, on platform(s):
- the operating system: Microsoft Windows NT
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SYMPTOMS
========
When SNA Server attempts to process two large print jobs (approximately 700
pages), the SNA 3270 Emulator logs an event 685, indicating that a failure to
extend a buffer pool occurred. The affected component is terminated and both
print jobs fail.
ID 685 Event Details
An attempt was made to extend a buffer pool, but the related pool had
reached its maximum size. The affected component is terminating, and an
audit of the buffer pools just before termination is attached
Pool Free Alloced Max
Trusted Hdr 122 157 100000
Trusted Elts 50 112 500000
Non-Trusted Hdrs 1 2993 3000
Non-Trusted Elts 87 3142 10000
Comname Pid Trusted Hdrs Elts
SNABASE 00000072 Y 0 0
MNGAGENT 000000A7 Y 8 11
MNGCLI 000000C1 Y 12 36
SNASERVR 00000068 Y 5 5
SNADLC2 00000106 Y 5 5
SNADLC1 000000F3 Y 5 5
WIN3270 000000F0 N 0 0
SNAPRINT 0000005A N 2992 3055
EXPLANATION
This error is almost always due to either an SNA component (including
possibly an emulator) losing buffers or a slow emulator (or RUI
application) using a session without pacing.
ACTION
Contact your support personnel.
CAUSE
=====
The print server will occasionally produce an extra credit message. Normally
this would not cause a problem. The print server would cope with the extra
message. However, in the case of a very large job, the print server never has
time to catch up with the extra messages. The input queue increases until the
buffer limit is reached (3,000 outstanding messages).
RESOLUTION
==========
Defer sending credit messages until the print server is capable of processing
the message immediately, so that the message is not put back on the input queue.
STATUS
======
Microsoft has confirmed this to be a problem in SNA Server 3.0 Service Pack 1
(SP1). This problem was corrected in the latest SNA Server version 3.0 U.S.
Service Pack. For information on obtaining this Service Pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
S E R V P A C K
Additional query words:
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Keywords : kbnetwork kbprint
Technology : kbAudDeveloper kbSNAServSearch
Version : WINDOWS:3.0 SP1
Issue type : kbbug
Solution Type : kbfix
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