PM79281: 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**** PE13/12/30 FIX IN ERROR. SEE APAR PM96332  FOR DESCRIPTION
  

APAR Information

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

  PM67891

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

  UK94164

Modules/Macros

• DFHAMCSD DFHAMPFI DFHAMPIL DFHAMRDI DFHAMST  DFHAPEX  DFHAPLI1
  DFHAPLJ1 DFHAPLX1 DFHAPRT  DFHAPRX  DFHBAA10 DFHBAA11 DFHBAA12
  DFHBAAC0 DFHBAAC1 DFHBAAC2 DFHBAAC3 DFHBAAC4 DFHBAAC5 DFHBAAC6
  DFHBAAC  DFHBAAR1 DFHBAAR2 DFHBABR  DFHBACM  DFHBACR  DFHBADM
  DFHBAPR0 DFHBAPR  DFHBASP  DFHBAUE  DFHBAXM  DFHBRAT  DFHBRFM
  DFHBRMP  DFHBRMR  DFHBRXM  DFHBSS   DFHBSTS  DFHBSTZO DFHCQSY
  DFHD2EX1 DFHD2TM  DFHDLIDP DFHDPIN  DFHDPLU  DFHDPWD  DFHDPWE
  DFHDPWJ  DFHDPWL  DFHDPXM  DFHECEAS DFHECEC  DFHECSC  DFHEIAD
  DFHEIIC  DFHEIQAS DFHEIQSA DFHEIQSQ DFHEIQST DFHEPEV  DFHESN
  DFHFCQI  DFHFCRP  DFHICP   DFHICUS  DFHICXM  DFHIEXM  DFHISAL
  DFHISCO  DFHISIC  DFHISIS  DFHISXM  DFHLDDM  DFHMEIN  DFHMNXM
  DFHMPAC  DFHMQQCN DFHMQTM  DFHMQTRU DFHPGAI  DFHPGDD  DFHPGRP
  DFHPIPL  DFHPIPM2 DFHPISC  DFHPITC  DFHPIWR  DFHPIXM  DFHRLBR
  DFHRLDM  DFHRLDUF DFHRLPK1 DFHRLPM  DFHRLRG1 DFHRLRO  DFHRLRS1
  DFHRLST  DFHRMLK4 DFHRMLN  DFHRMLSO DFHRMLSS DFHRMLSU DFHRMOT
  DFHRMRS  DFHRMU1D DFHRMUC  DFHRMUO  DFHRMUW1 DFHRMUWP DFHRMUWQ
  DFHRMUWW DFHRMUW  DFHRZDM  DFHRZIX  DFHRZLN  DFHRZNR2 DFHRZRG2
  DFHRZRM  DFHRZRS1 DFHRZSO1 DFHRZSO  DFHRZTA  DFHRZTCX DFHRZTR1
  DFHRZTRI DFHRZXM  DFHSHDM  DFHSHPR  DFHSHRE1 DFHSHRM  DFHSHRQ1
  DFHSHRQ  DFHSHRR  DFHSHTI  DFHSHXM  DFHSII1  DFHSJJS  DFHSJXM
  DFHSNAS  DFHSNPU  DFHSNSU  DFHSNTU  DFHSNUS  DFHSNXR  DFHSODM
  DFHSOXM  DFHTCRP  DFHTDA   DFHTDTM  DFHUSADT DFHUSAD  DFHUSDM
  DFHUSDUF DFHUSES  DFHUSFL  DFHUSIS  DFHUSST  DFHUSTI  DFHUSTRI
  DFHUSXM  DFHW2AT  DFHW2DM  DFHWBA   DFHWBBLI DFHWBBMS DFHWBDM
  DFHWBSR  DFHWBTL  DFHWBTTA DFHWBXM  DFHWBXN  DFHWSATR DFHXFP
  DFHXFQ   DFHXFX   DFHXMIQ  DFHXMRM  DFHXMRU  DFHXMXD  DFHXMXM
  DFHXSRC  DFHXTP   DFHZATA2 DFHZGAI  DFHZSGN  DFHZTSP
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R800 PSY UK94164

     UP13/05/17 P F305

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.