PM67891: DFHSN0002 A SEVERE ERROR (CODE X'2056') HAS OCCURRED IN PROGRAM DFHSNAS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During the ENF processing, the snex is never updated to use the
  new user token, so it still has the old token. When
  SIGNON_ATI_SESSION processing, the snex_session_user_token is
  compared to the token return on the ADD_USER_WITHOUT_PASSWORD
  and they are different. This is not expected, so *EXC*
  USER_TOKEN_MISMATCH and DFHSN0002 dump was taken.
  .
  Additional Symptom(s) Search Keyword(s): KIXREVSWM
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: msgDFHSN0002 A severe error (CODE       *
  *                      X'2056') has occurred in program        *
  *                      DFHSNAS when using connections with     *
  *                      preset security.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A CICS region is connected to another using an MRO connection
  with preset security.  When the connection is acquired a
  sign on is done for each session using the preset userid.
  The user token from this signon is stored in the SNEX for the
  session.
  
  At some later point CICS receives a notification from RACF
  that the group connection status of the preset userid has
  changed.  This causes user domain to mark the USUDB as having
  received a notification.
  
  A remote terminal start is then shipped to this CICS region
  across the MRO connection.  DFHSNAS performs a new signon of
  the session user, which is the preset userid.  DFHUSAD
  detects that the USUDB has received a notification so a full
  signon is done and a new USUDB and user token get created.
  The new user token is returned to DFHSNAS.  DFHSNAS detects
  that the user token has changed from the one stored in the
  SNEX.  This is unexpected so message DFHSN0002 is issued.
  
  Additional keywords:
  SN0002  ENF
  

Problem conclusion

• DFHUSAD has been changed so that session signons are no longer
  affected by RACF notifications.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

• ž**** PE12/12/21 FIX IN ERROR. SEE APAR PM79647  FOR DESCRIPTION
  ž**** PE12/12/21 FIX IN ERROR. SEE APAR PM79647  FOR DESCRIPTION
  ž**** PE13/12/30 FIX IN ERROR. SEE APAR PI08773  FOR DESCRIPTION
  

APAR Information

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

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

  UK83850 UK83851 PM79281

Modules/Macros

•    DFHAMPFI DFHAMRDI DFHAMST  DFHFCRP  DFHSNAS
  DFHSNPU  DFHSNSG  DFHSNSU  DFHSNTU  DFHSNUS  DFHUSAD  DFHUSADT
  DFHUSDM  DFHUSES  DFHZSGN
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK83850

     UP12/12/13 P F212

• R700 PSY UK83851

     UP12/12/13 P F212

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.