Following errpt entry was logged while start up/shutdown of
cluster without any acual error.
.
LABEL        : TS_NIM_ERROR_STUCK_
Resource Name: topsvcs
Description  : NIM thread blocked
.
Probable Causes
A thread in Topology Services NIM process was blocked
Topology Services NIM process cannot get timely access to CPU
.
Detail Data
DETECTING MODULE
rsct,nim_control.C,1.19,5046
Interface name  :  en1
.
 According to a dev., It's known behavior of nim. But user hope
supress of such ambiguous error logging.

Problem summary 
In HACMP/ES, when a node is acquiring or releasing service
addresses (including at cluster startup and shutdown), it
is possible for AIX error log entries such as the
following to appear:

LABEL:          TS_NIM_ERROR_STUCK_
IDENTIFIER:     864D2CE3

Date/Time:       Wed Jan 29 23:47:20 EST

 ...

Thread which was blocked
main thread
Interval in seconds during which process was blocked
         7
Interface name
tr1


The error log entry is harmless; it is caused by
one of RSCT Topology Services's Network Interface Module
(NIM) processes taking a few seconds to process the
operations involved during IP Address Takeover. Had the
error log entry appeared in steady state operation, this
would have indicated a real thread blockage problem.
Problem conclusion 
The problem was caused by the code in RSCT Topology
Services's Network Interface Module (NIM) not recognizing
a special case during IP Address Takeover (IPAT): the NIM
process's main thread takes a few seconds to complete a
certain operation. This apparent "blockage" causes the NIM
to issue (via the Topology Services daemon) the
TS_NIM_ERROR_STUCK_  AIX error log entry.

The code in the NIM is being fixed to recognize the special
IPAT case, so that no "false" TS_NIM_ERROR_STUCK_ error
entry is issued.
Temporary fix 
Comments 
APAR information
APAR number
IY38496
Reported component name
RSCT V510
Reported component ID
5765E6110
Reported release
221
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2003-01-02
Closed date
2003-02-05
Last modified date
2003-04-17

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:
IY40268 U488052

Publications Referenced

Fix information
Fixed component name
RSCT V510
Fixed component ID
5765E6110

Applicable component levels
R221 PSY U488305
UP03/04/17 I 1000