OA57267: AFTER PUTTING CF INTO MAINTMODE, LOCK STR IN ASYNC SM DUPLEX WAS UNDERGOING REBUILD AND HANG. IXC571I QUIESCE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer has 3 CFs (i.e CF1, CF2 and CF3) in configuration.
  While a LOCK str was in SM Async Duplex mode between CF1 and
  CF2, CF2
  was put into MAINTMODE, then SETXCF START,REALLOCATE was issued
  to perform rebuild. The reallocate processing was hang after
  IXC571I SYSTEM-MANAGED DUPLEXING REBUILD FOR STRUCTURE
  xxx_LOCK1 HAS COMPLETED THE STARTUP PHASE        AND IS ENTERING
  THE QUIESCE PHASE.
  D XCF,STR,STRNM=xxx_LOCK1  output shows the connector with
  ..
   * ASTERISK DENOTES OUTSTANDING REBUILD PROCESSI
   CONNECTION NAME  ID VERSION  SYSNAME  JOBNAME
   ---------------- -- -------- -------- --------
  *DXRDD2L$$IDL1001 02 000200BA D005     DDL1IRLM
   DXRDD2L$$IDL2002 01 000100B1 D004     DDL2IRLM  This REALLOCATE
  processing must be stopped via SETXCF STOP,REALLOCATE  then
  SETXCF STOP,REALLOCATE,FORCE
  There was no IXL041E as the rebuild was not hang waiting for
  event respond.
  Console dump of this connector address space and all the
  dataspaces should be taken prior canceling this connector.
  This connector must be canceled before this LOCK
  str can be establishing its SM Duplex between CF1 and CF3.
  
  VERIFICATION STEPS:
  From the console dump of the connector address space, issue :
  XESDATA CONNECTION STR(XXX_LOCK1) DETAIL,
  
  It shows :
   System-managed duplexing rebuild is in progress
   Duplexing protocol.......... (Could be Synchronous or
  Asynchronous)
   Auto Version................ ...
   Connection is quiesced for a system-managed pro
   System-managed quiesce phase completed
   ************************
  ..
     Global Data Space   Name: nnnnnIXL Alet:
  ..
  Connection Related Recovery in Progress:
    Diag008: 000530B0 nnnnnIXL
    Requests waiting for Async Completion... 0
    Auto Quiesce Recovery Processing:
       Connection Identifier.. 00
       Connection Version..... 00000000
       Recovery Function...... 001C       <-
       Auto Quiesce Sequence.. 000000nn
       Event Sequence......... 000000nn
       Auto Quiesce Indicated. Yes
               ***
       Resume After Quiesce... Yes
       Auto Version........... ,,,,,,,, ,,,,,,,,
       Diag009................ 00125028 nnnnnIXL
  ..
  Browse the storage in the dump using 10%+8C?+9C?+FC to find the
  address at this location (ie, say it is xxxxxxxx), Then issue :
  L xxxxxxxx+34 asid(aa) DSP(nnnnnIXL) ( where the aa in the asid
  is the decimal asid# of this lock str connecntor).
  The first byte at this storage location should have x04.
  

Local fix

• BYPASS/CIRCUMVENTION:
  No local fix is available
  
  RECOVERY ACTION:
  Taking the console dump of the hang connector address space and
  dataspaces, then cancel this
  connector address space.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users who are running in a Parallel Sysplex                  *
  * environment making use of system-managed                     *
  * asynchronously duplexed coupling facility                    *
  * (CF) lock structures for sysplex-scope                       *
  * serialization functions.                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Due to a programming error, when a                           *
  * system-managed asynchronously duplexed                       *
  * structure is stopped to switch to                            *
  * the new structure, subsequent                                *
  * system-managed rebuild                                       *
  * processing may hang while                                    *
  * attempting to quiesce                                        *
  * activity to the structure.                                   *
  *                                                              *
  * SYSPLEXDS                                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * PTFs should be applied to all systems in the                 *
  * sysplex via rolling IPL.                                     *
  ****************************************************************
  Due to a programming error, an internal XES indication used to
  indicate the structure is quiesced may not be properly reset
  when a system-managed asynchronously duplexed structure is
  stopped to switch to the new structure.  This timing
  dependent problem prevents subsequent system-managed rebuild
  processing to start a rebuild from progressing past
  the quiesce phase as indicated by MSGIXC571I.  Displaying
  structure status via the D XCF,STR,STRNAME=xxx command shows
  a connector with outstanding rebuild processing in MSGIXC360I.
  
  While attempts to stop the rebuild in this state may cause
  MSGIXC367I to be issued indicating the rebuild request has been
  accepted, no further progress is made to stop the rebuild due to
  the hang condition.
  

Problem conclusion

• Modifications made to ensure internal XES indication used to
  indicate the structure is quiesced gets properly reset after a
  system-managed asynchronously duplexed structure is stopped to
  switch to the new structure.  This prevents the hang
  condition and allows subsequent system-managed rebuild
  processing that starts or stops a rebuild to properly
  complete.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UJ00787 UJ00789 UJ00790

Modules/Macros

• IXLR2PLA
  

Fix information

• Fixed component name

  CROSS SYS.EXT.S

• Fixed component ID

  5752SCIXL

Applicable component levels

• R7A0 PSY UJ00790

     UP19/09/25 P F909 ¢

• R7B0 PSY UJ00787

     UP19/09/25 P F909 ¢

• R7C0 PSY UJ00789

     UP19/09/25 P F909 ¢

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.