VM66844: Z/VM 7.4 CP FIX PACK: FEATURE 01 FIX 02 25/05/27 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• This is Fix Pack 2 of Feature Pack 01 for z/VM 7.4.  It contains
  fixes for the following problems:
  1. Transactional execution disablement and use discovery.
  2. LOGOFF delay may prevent SSI LOGOFF notification.
  3. Defects in SCSI alternate device support.
  4. FOR command causes CNF001 Soft ABEND.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of the transactional execution         *
  *                 facility, single system image, SCSI          *
  *                 alternate path support, the CP FOR command   *
  *                 or Diagnose 26C                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  Transactional Execution Disablement and Use Discovery
  -----------------------------------------------------
  
  Transactional execution disablement and use discovery
  introduces a new command, SET FACILITY, and a new
  system configuration statement, SYSTEM_FACILITY, to
  control transactional-execution behavior for z/VM virtual
  machines. Another new command, QUERY FACILITY, can
  display the underlying machine and configured facility
  settings. Monitor records report facility alteration
  settings and a virtual machine's first use of facilities
  that is detected.
  
  A LOGOFF delay may prevent SSI LOGOFF notification
  --------------------------------------------------
  
  In some situations, SSI LOGOFF notification may not be
  broadcast in a timely manner, allowing the underlying data
  to be changed so that when the notification is sent, the
  affected user cannot be identified. Thus, the user may
  appear to some members of the SSI cluster to be logged on
  while appearing not logged on to others.
  
  Defects in SCSI alternate device support
  ----------------------------------------
  
  Duplicate alternate device definitions were not always
  detected.
  
  FOR command causes CNF001 Soft ABEND
  ------------------------------------
  
  In some circumstances issuing a FOR command may result in
  a CNF001 soft abend. In other cases the response to a FOR
  command may not be delivered (e.g., through the *ASYNCH
  IUCV Systems Service) as expected.
  
  PRG004 if invalid buffer length provided to Diagnose 26C
  --------------------------------------------------------
  
  An invalid buffer length may cause a PRG004 ABEND in
  Diagnose X'26C' (Access Certain System Information).
  

Problem conclusion

• Transactional Execution Disablement and Use Discovery
  -----------------------------------------------------
  
  This new function can be exploited to detect applications that
  use the Transactional Execution Facility.
  
  A LOGOFF delay may prevent SSI LOGOFF notification
  --------------------------------------------------
  
  Code has been changed to ensure that notifications are sent
  correctly.
  
  Defects in SCSI alternate device support
  ----------------------------------------
  
  Duplicate alternate device definition checking has been improved
  to ensure that duplicates are detected and reported correctly.
  
  FOR command causes CNF001 Soft ABEND
  ------------------------------------
  
  Command response handling has been corrected to ensure that FOR
  command responses are delivered as expected.
  
  PRG004 if invalid buffer length provided to Diagnose 26C
  --------------------------------------------------------
  
  Code has been changed to validate the Diagnose 26C buffer
  length.
  

Temporary fix

• FOR RELEASE VM/ESA CP/ESA R740 :
  PREREQ: VM66839 VM66819 VM66829
  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:

  UM90528

Modules/Macros

• CPLOAD   HCPALL   HCPARD   HCPCFR   HCPCPE   HCPDIR   HCPFAC
  HCPFCL   HCPIIO   HCPMDLAT HCPMES   HCPMESB  HCPMNU   HCPMOM
  HCPMONEQ HCPMTS   HCPMXF   HCPMXL   HCPMXRBK HCPQUY   HCPRLE
  HCPRP    HCPRST   HCPSET   HCPSWD   HCPSYS   HCPSYSCM HCPUSP
  HCPUSR   HCPVMDBK HCPVTX   HCPZSC   MRMTRFAC MRMTRSYS MRSYTSYG
  MRUSEACT MRUSELOF 7VMCPR40
  

Fix information

• Fixed component name

  VM CP CP

• Fixed component ID

  568411202

Applicable component levels

• R740 PSY UM90528

     UP25/06/05 P 2502 A

Fix is available

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