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MF50178 - LIC-LOOP SAVE JOB HUNG WITH TASK LDDOIM LOOPING

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-LOOP SAVE JOB HUNG WITH TASK LDDOIM LOOPING


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.

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REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
BRMS save job hung and after no apparent activity, it was ended.
During the ENDJOB, it was noted that LDDOIM was consuming 138%
of the CPU. Tape write error recovery processing had been
enabled for the tape drive which was being used for the save.

CORRECTION FOR APAR MA39330 :
-----------------------------
The LDDOIM task was looping as the system tried to keep enough
resources available  to recover from a media error if one was
encountered while writing to tape.  The combination of a large
device cache and a large object which compacted very well led to
the task looping.  The system code will be changed to prevent
the loop.  This problem is unique to tape write error recovery
processing which is disabled by default and must be explicitly
enabled in order to be used.

CIRCUMVENTION FOR APAR MA39330 :
--------------------------------
Disable tape write error recovery processing.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF49966      LIC-MSGMCH5204 Save operation ends abnormally
   MF48466      LIC-MSGMCH5204 Incorrect object identified after save error
   MF49881      LIC-WAIT Job hangs while performing save operation

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA39330
Superseded by:......................View fix details for PTF MF61797
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C1116710


System i Support

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Document Information

Modified date:
27 May 2010