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SI50910 - OSP-LCKW-MSGCPF34DC-F/QSPDSPRW-T/QUIMNDRV-RC3406 WORKING WIT

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

OSP-LCKW-MSGCPF34DC-F/QSPDSPRW-T/QUIMNDRV-RC3406 WORKING WIT


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
NONE



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the license agreement which
accompanied, or was contained in, the Program for which you are obtaining
the PTF.  You are not authorized to install or use the PTF except as part
of a Program for which you have a valid Proof of Entitlement.

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APAR Error Description / Circumvention

-----------------------------------------------
The PSF writer for one particular *LAN IPDS printer device
description will periodically go to a LCKW (Lock Wait) status
and then to a MTXW (Mutex Wait) status. Once this has occurred,
attempting to work with that particular writer, or doing a
"WRKWTR WTR(*PRT)", fails with MSGCPF34DC RC3406.

Increasing the DFTWAIT time to 999999 seconds on the interactive
job description made the problem worse instead of better.

CORRECTION FOR APAR SE56668 :
-----------------------------
Program QSPWKSTS (the WRKPRTSTS command) was locking the output
queue and then the writer workspace.  QSPWTRM1 (the writer) was
locking the writer workspace first, and then the output queue.
(These are not object locks and do not show up in the DSPJOB
option 12 lock list.)  If both programs run at exactly the same
time, a deadlock occurs until the DFTWAIT interval expires for
the WRKPRTSTS job and it fails with CPF34DC or CPF3330.
QSPWKSTS will now unlock the output queue before locking the
writer workspace.

CIRCUMVENTION FOR APAR SE56668 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
     NONE

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770SS1
APAR Fixed..........................View details for APAR SE56668
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C4143710


System i Support

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Document Information

Modified date:
15 October 2013