VM66796: Z/VM 7.4 CP FIX PACK - FEATURE LEVEL 00 FIX LEVEL 03

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• This APAR contains service for z/VM version 7 release 4 Fix Pack
  3
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of z/VM                            *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  This is the APAR for z/VM 7.4 Fix Pack 3.  As such it
  contains fixes for the following three problems:
  
  Problem 1
  ABENDSXA004 CHANGE/TRANSFER FAIL TO RELEASE STORAGE
  
  ABENDSXA004 can occur due to many cross-member CP TRANSFER or
  CP CHANGE commands if they change the spool file owner.  Under
  some circumstances the memory used for a DVMD that is used
  for an ESM call is not released and a storage leak occurs.
  
  -----
  
  Problem 2
  CP SPOOL PROCESSING CAUSES DIRMAINT MESSAGE FLOOD
  
  The problem is in the spool TRANSFER and CHANGE command
  processing in an SSI cluster.  Specifically, the problem occurs
  when a TRANSFER or CHANGE command is issued for a file a user
  owns that is a copy file on the member where the user is logged
  on.  When the file is moved between spool device queues (rdr to
  prt/pun or prt/pun to rdr) but the owner of the file is not
  changed, the file ends up in a bad state.  The command response
  indicates the file was transferred but it only happens on the
  file's originating member and not on the copy member.  This
  leads to further unexpected behavior of other spool commands
  such as QUERY RDR/PRT/PUN, QUERY FILES and PURGE.
  
  -----
  
  Problem 3
  VARY HANGS AFTER UNPLANNED HYPERSWAP
  
  I/O requests are issued during the recovery process for unit
  checks associated with the suspension of PPRC/Metro Mirror
  relationships for DASD devices.  During this recovery, I/O
  requests on the associated control unit are quiesced to allow
  this recovery to complete and the condition is then reset.  It
  was determined that some of this related recovery I/O could be
  deferred and issued after the control unit quiesce has been
  reset.  This would allow the I/O subsystem for the control unit
  to be returned to normal operation as soon as possible.
  

Problem conclusion

• Problem 1
  ABENDSXA004 CHANGE/TRANSFER FAIL TO RELEASE STORAGE
  
  Because the DVMD is only needed for the ESM call, the DVMD is
  obtained only in the case when that ESM call is needed.  To
  ensure that the conditional obtain and release of the DVMD are
  in agreement, a test is added to HCPSCO subroutine FINDUSER to
  call HCPUDRFU instead of HCPUDRGU when the protect flags are on
  but the TRANSFER or CHANGE came in as a cross-system command.
  
  -----
  
  Problem 2
  CP SPOOL PROCESSING CAUSES DIRMAINT MESSAGE FLOOD
  
  Code has been added to HCPXTPCK to update SPFBRDBT when the
  SPFBBITS field is updated prior to calling the routines to
  update the copy systems.
  
  -----
  
  Problem 3
  VARY HANGS AFTER UNPLANNED HYPERSWAP
  
  PPRC/Metro Mirror suspension recovery was updated to reset the
  associated control unit quiesce condition as soon as possible
  and then complete the remainder of the associated recovery.
  This reduces the potential for other processes to be delayed by
  the pending PPRC suspend recovery process.
  

Temporary fix

• FOR RELEASE VM/ESA CP/ESA R740 :
  PREREQ: VM66795
  CO-REQ: NONE
  IF-REQ: NONE
  

Comments

APAR Information

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

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

  UM90478

Modules/Macros

• HCPCPE   HCPSCO   HCPSDV   HCPXTP   7VMCPR40
  

Fix information

• Fixed component name

  VM CP CP

• Fixed component ID

  568411202

Applicable component levels

• R740 PSY UM90478

     UP24/09/27 P 2501 ¢

Fix is available

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