OA48521: HANG ON SYSZIGG4 AFTER RESUME IS ISSUED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• SYSZIGG4 is the resource used to control access to a catalog
  when the ALTER SUSPEND or F CATALOG,RECOVER,SUSPEND commands are
  issued.   In cases when requests not authorized to the
  IGG.CATLOCK facility class begin queueing for access to the
  catalog and RESUME is finally issued,  these requests will
  remain waiting of the SYSZIGG4 resource which is never released.
  ALTER RESUME fails to release the resource and there are
  varying degrees of success using the F CATALOG,RECOVER,RESUME
  command.
  
  IEC367W CATALOG STILL SUSPENDED
  
  CATKEYS: CAT2015 CATHANG CATRLS
  

Local fix

• F CATALOG,RECOVER,RESUME or ALTER UNLOCK the catalog.  If that
  fails to release contention, use F CATALOG,RESTART to free the
  SYSZIGG4 resource
  additional local fix:
  Issue MODIFY CATALOG UNLOCK for catalog.
  Issue MODIFY CATALOG RECOVERY RESUME for catalog.
  Issue MODFIY CATALOG ALLOCATED to ensure catalog is no longer in
  SUSPEND status.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of User Catalog HDZ2210 and above. *
  ****************************************************************
  * PROBLEM DESCRIPTION: When issuing F CATALOG,RECOVER,         *
  *                      RESUME(UCAT) against a suspended        *
  *                      User Catalog that is not in a           *
  *                      SYSPLEX environment may experience      *
  *                      a hang.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When F CATALOG,RECOVER,RESUME(UCAT) is issued against a
  UCAT that is not shared in a SYSPLEX environment
  ENQUEUE SYSZIGG4 is not released which results in a
  Hang.
  

Problem conclusion

• The Catalog Resume code was modified to to release
  the SYSZIGG4 ENQUEUE and allow requests to be resumed.
  

Temporary fix

Comments

APAR Information

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

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

  UA80743 UA80744

Modules/Macros

• IGG0CLRC
  

Fix information

• Fixed component name

  ICF CATALOG & I

• Fixed component ID

  5695DF105

Applicable component levels

• R210 PSY UA80744

     UP16/03/21 P F603

• R220 PSY UA80743

     UP16/03/21 P F603

Fix is available

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