OA64399: HUNG LATCH AFTER SMSVSAM TERMINATION DURING QUIBWO REQUEST

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If SMSVSAM is terminated during a QUIBWO request (such as DSS
  DUMP) a subsequent OPEN of the impacted data set may hang. The
  following latch contention can be seen after a D SMS,SMSVSAM(C)
  command:
  
  IGW343I VSAM RLS DIAG STATUS (V.01)
            
  |----RESOURCE---| |------ WAITER ------|
  |--HOLDER---| ELAPSED   
  TYPE        ID    JOB NAME ASID   TASK
   ASID   TASK     TIME    
  -------- -------- -------- ----
  -------- ---- -------- --------- 
  LATCH    7EDAFEF0 SMSVSAM
  003A 008D3C68 003A 008D6E88  00:26:43 
  LATCH    7EDB1670 SMSVSAM
   003A 00000000 003A 008D6E88  00:26:51 
      DESCRIPTION:
  IGWLYSPH - SHM OBJECT POOL                   
  
  This is similar
  to OA5443, but impacts the QUIBWO open code path.
  
  KNOWN IMPACT:
  Impacted data set cannot be opened
  
  Aditional Keywords:
  ZOS0301C/K ZOS0302C/K ZOS0205C/K
  

Local fix

• BYPASS/CIRCUMVENTION:
  Avoid SMSVSAM termination while processing a DSS Dump on a BWO
  data set.
  
  RECOVERY ACTION:
  Restart SMSVSAM with V SMS,SMSVSAM,TERMINATESERVE & V
  SMS,SMSVSAM,ACTIVE. If this does not work, use FORCE SMSVSAM,ARM
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All VSAM RLS users running a DSS Dump        *
  *                 (backup) or equivalent non-IBM utility in a  *
  *                 sysplex.                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Terminating a SMSVSAM server during a   *
  *                      hung DSS dump/copy may orphan the       *
  *                      event. Upon restarting SMSVSAM,         *
  *                      subsequent attempts to OPEN he impacted *
  *                      data set will cause a HANG due to       *
  *                      SYSVSAM ENQ contention.                 *
  ****************************************************************
  

Problem conclusion

• SMSVSAM will obtain SYSVSAM SphereName.CatalogName..D shared
  resource on all LPARs utilizing a given data set during
  quiesce processing in order to prevent subsequent opens on
  the affected data set.
  
  This APAR is a toleration APAR for OA67847 which provides
  the full fix. This toleration APAR must be applied on all
  SMSVSAM systems in the sysplex before OA67847 is applied to
  any one SMSVSAM system.
  
  KEYWORDS: RLSPSP/K
  

Temporary fix

Comments

• quiesce for copy / quiesce for backup while open, as issued
  during DSS dump or DSS backup Sysvsam enq contention
  

APAR Information

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

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

  OA67847 OA68057 UJ97967 UJ97968 UJ97969

Modules/Macros

• IDAVQDRV
  

Fix information

• Fixed component name

  VSAM REC LEV SH

• Fixed component ID

  5695DF122

Applicable component levels

• R250 PSY UJ97969

     UP25/10/08 P F510 ¢

• R310 PSY UJ97968

     UP25/10/08 P F510 ¢

• R320 PSY UJ97967

     UP25/10/08 P F510 ¢

Fix is available

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