PH26133: ABEND0C4 DFHMNSU OFFSET X'1620' DFHMN0001 20/06/22 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When CICS is initializing there is a call to see if IBM® z/OS®
  Workload Interaction Correlator which produces DFHMN0001
  ABEND0C4 in DFGMNSU. CICS is starting up, and the domains are
  initializing. Monitor Domain starts initialization and starts
  various activities.
  .
  PA and XM domains drive DFHMNSU which
  calls DFHMNSVC to issue PB_CREATE.
  
  Meanwhile, at some point,
  MN domain wants to find out if ZWIC is needed and drives
  DFHMNSU which calls DFHMNSVC to issue ZWIC_REGISTER.
  
  If the
  DFHMNSU->DFHMNSVC->ZWIC_REGISTER call happens while all of
  those DFHMNSU->DFHMNSVC->PB_CREATE are occurring, then there
  can be a conflict in the use of the MAFPB control block.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users with PH16392 applied.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS initialisation abends when the     *
  *                      Monitoring Domain tries to initialise   *
  *                      a zWIC (IFAWIC) buffer using a null     *
  *                      pointer.                                *
  ****************************************************************
  CICS initialisation fails with an 0C4 abend in module DFHMNSU
  on an EXECUTE instruction: 4490 6008.
  The error can be reported at offset X'1620' or X'1A8C' in
  DFHMNSU.
  The EX target instruction is an XC: D700 7000 7000.
  The problem is that Register 7 is 00000000_00000000
  causing the XC instruction to fail.
  MN domain has called DFHMNSVC to obtain a zWIC buffer,
  but the call failed, and returned a null pointer.
  Subsequent use of the null pointer caused the 0C4.
  
  Keywords: mna_state_lock
  

Problem conclusion

• UI69119 UI69121
  
  DFHMNSU has been changed to serialise calls to DFHMNSVC
  for zWIC buffer allocation.
  

Temporary fix

Comments

APAR Information

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

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

  PH26672 UI70184 UI70185

Modules/Macros

• DFHAPJVM DFHAXIS2 DFHCDJNI DFHDMDM  DFHDMDUF DFHDMEN  DFHDMENF
  DFHDMENS DFHDMSVC DFHDMTRI DFHFCRP  DFHFORMS DFHIFTGL DFHMEMNC
  DFHMEMNE DFHMEMNK DFHMNAC  DFHMNAD  DFHMNDM  DFHMNDUF DFHMNDUP
  DFHMNES  DFHMNHS  DFHMNIA  DFHMNMN  DFHMNNT  DFHMNOD  DFHMNSM
  DFHMNSR  DFHMNST  DFHMNSU  DFHMNSUT DFHMNSVC DFHMNSY  DFHMNTD
  DFHMNTI  DFHMNTRI DFHMNUE  DFHMNXM  DFHSJSA  DFHSTNDD DFHTKDUF
  DFHUSDM  DFHWICCD DFHWICEX DFHXMXD  DFHZFSSH DFJ@H356 DFJ@H360
  DFJ@H427 DFJ@H467 DFJ@H468 DFJ@H593 DFJDTCOE DFJOUTRE DFJWLPBP
  DFJWLPPL
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI70185

     UP20/06/24 P F006 {

• R200 PSY UI70184

     UP20/06/24 P F006 {

Fix is available

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