VM66244: ABENDPRG004 DURING DETACH OF HYPERPAV BASE DEVICE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During a Linux guest logoff an ABENDPRG004 occurred while
  detaching a virtual HyperPAV Base device that had virtual
  HyperPAV Aliases associated to it.  The virtual HyperPAV
  Alias queue anchored from the virtual HyperPAV Base device
  was corrupted.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All z/VM users of virtual HyperPAV           *
  *                 Alias devices.                               *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  ABENDPRG004 can occur when virtual HyperPAV Alias devices are
  left intact while the corresponding real HyperPAV Alias devices
  are detached from the system.  A real system-attached HyperPAV
  Alias device should not be allowed to be detached from the
  system while there are any associated virtual HyperPAV Alias
  devices (VDEVPREF points to RDEV address of real HyperPAV
  Alias device).  However, the use of RDEVLCNT to determine if a
  real HyperPAV Alias device can be detached from the system
  (RDEVLCNT must be 0) is erroneous and sometimes allows this to
  occur.  Leaving a virtual HyperPAV Alias configuration around
  while the associated real HyperPAV Alias is not system-attached
  can lead to unpredictable processing resulting in a system
  ABEND.
  

Problem conclusion

• ABENDPRG004 - DETACH processing was modified to use RDEVHPLK
  instead of RDEVLCNT when determining if a real HyperPAV Alias
  device can be detached from the system.  RDEVHPLK (linked list
  of virtual HyperPAV Alias VDEVs associated with this real
  HyperPAV Alias RDEV) must be zero in order for the real
  HyperPAV Alias device to be detached from the system.
  

Temporary fix

• *********
  * HIPER *
  *********
  FOR RELEASE VM/ESA CP/ESA R640 :
  PREREQ: VM66237
  CO-REQ: NONE
  IF-REQ: NONE
  FOR RELEASE VM/ESACP/ESAR710 :
  PREREQ: VM66237
  CO-REQ: NONE
  IF-REQ: NONE
  

Comments

• ×**** PE19/12/18 FIX IN ERROR. SEE APAR VM66356  FOR DESCRIPTION
  

APAR Information

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

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

  UM35528 UM35529

Modules/Macros

• HCPDTS   HCPHPV
  

Fix information

• Fixed component name

  VM CP

• Fixed component ID

  568411202

Applicable component levels

• R640 PSY UM35528

     UP19/09/26 I 1000 ¢

• R710 PSY UM35529

     UP19/09/26 P 2101 ¢

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.