Event 3 May Indicate Excessive APPC LU Partnerships
Article ID: 150628
Article Last Modified on 11/26/2003
APPLIES TO
- Microsoft SNA Server 2.0, when used with:
- Microsoft SNA Server 2.1, when used with:
- Microsoft SNA Server 3.0, when used with:
- Microsoft SNA Server 2.11 Service Pack 1, when used with:
This article was previously published under Q150628
SYMPTOMS
If you define too many LU-LU partnerships, SNA Server will run out of
Internal Mode Control Blocks. You may get the following Dr. Watson error
message in SNA Server:
80000003 (hardcoded breakpoint).
In addition, the following Event 3 will be logged in the Application Event
log:
Event ID: 3 (1102) Node Configuration Error
EXPLANATION:
The SNA server (node) detected a configuration file problem caused by a
logic error in the configuration program. These subcodes should not
occur during normal operation.
CAUSE
Each LU-LU partnership requires one Internal Mode Control Block (IMCB), and
an additional IMCB is reserved if the LU is defined for parallel sessions.
The limit is 4096 Internal Mode Control Blocks per SNA Server.
For example, a configuration with 240 connections (each with 1 LU defined)
and a node with 10 local LUs (each partnered with every remote LU) will
result in the use of 2400 Mode control blocks. In addition, if the LUs
support parallel sessions, each is implicitly partnered with the SNASVCMG
mode for CNOS, taking up another 2400 control blocks, for a total of 4800
control blocks. Therefore, the node reports the error and terminates.
WORKAROUND
Reduce the number of LOCAL LUs configured. Each local LU that is removed
saves 2*partner LU Mode control blocks.
Additional query words: 2.00 2.11 2.11.sp1
Keywords: kbprb KB150628