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SUBJECT:         APAR  NUMBER: PJ27334 
 
REFERENCE:  AREA:     LOCK MANAGEMENT 
            SEGMENT:  CLMNH0     - RELEASE:  HPO   (Assembler) 
 
 
Pre-requisite APARs are: 
FOR SEGMENT CLMNH0     (Assembler) - REL HPO 
 PJ14624  PJ25094  PJ25182  PJ25194  
 PJ25300  PJ25369  PJ26006  
 PJ26707  
To be applied in the order listed for each segment. 

ABSTRACT OF PROBLEM 
___________________ 
Non-catastrophic  OPR-6C2  may  occur  when deleting locks for a 
module going offline in an MDBF system. 
 

COMMENTS ON PROBLEM 
___________________ 
A BSS device was taken offline due to a lost interrupt.  It  was 
a  prime pack.  Eventually, CLMN was invoked to delete locks for 
the module that went offline. 
 
CLMN issues an FDCTC to delete a lock and took  the  error  path 
due  to  the  module  being  offline.   Next, the SSST chain was 
searched to get the next device in order  to  perform  the  I/O. 
The  next device in the chain belonged to a different subsystem. 
Since the symbolic module number associated with this device was 
outside the range defined in the original  subsystem's  Keypoint 
6,  the subsequent FDCTC failed with a software error posted and 
a OPR-6C2  was issued. 
 

SOLUTION 
________ 
Segment CLMN was modified to save the DBI upon entry. 
 
If CLMN issues an FDCTC macro and takes the error  path  due  to 
the mod being offline, it will now CEBIC to the subsystem of the 
next device in order on the SSST chain. 
 
If  the  DBI  has  been changed, CLMN will restore the saved DBI 
before exiting. 
 
DEPENDENCIES 
____________ 
 
Related Segments Affected By This APAR. 
_______________________________________ 
 
Segments to be assembled or compiled: 
 
Segments to be link edited: 
 
Load Modules to be loaded: 
 
Migration Considerations 
======================== 
      None 
 
 
BUILD/TEST INSTRUCTIONS 
_______________________ 
 
 ===BUILD Instructions=== 
 
No special build instructions. 
 
Stubs to be built: 
 
 ===TEST Instructions=== 
 
No special test instructions. 
 
-- END APAR PJ27334 
 
 
 



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