PI85028: 0C4/AKEX ABEND AT OFFSET X'245E' IN MODULE DFHSOSE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The log shows below message,
  +DFHSO0001 An abend (code 0C4/AKEX) has occurred at offset
  X'245E' in module DFHSOSE.
  .
  The SO0001 dump shows Tran CWXN was occurring the error and
  running on S8 tcb. The failing instruction is XC due to
  Register 5 with all zeroes. R5 is loaded from R2+x'144' and R2
  is SOCKET ADDRESS. You can find this address in the CICS trace
  and it shows the tran CWXN tried to close this socket which had
  been already closed by another task and the storage was also
  freemained. Two tasks closing the same socket leads to this
  0C4 abend. The related trace entries are as below,
  .
  SO 0801 SOSE  ENTRY - FUNCTION(SECURE_SOC_CLOSE)
  SOCKET_ADDR(xxxxxxxx)
            TASK-25860 KE_NUM-006F TCB-S8014/009AFE88 RET-AF003016
  .
  SO 0802 SOSE  EXIT  - FUNCTION(SECURE_SOC_CLOSE) RESPONSE(OK)
            TASK-25860 KE_NUM-006F TCB-S8014/009AFE88 RET-AF003016
  .
  SO 0801 SOSE  ENTRY - FUNCTION(SECURE_SOC_CLOSE)
  SOCKET_ADDR(xxxxxxxx)
            TASK 25851 KE_NUM-006E TCB-S8012/009877F0 RET-AF003016
  .
  SM 0301 SMGF  ENTRY - FUNCTION(FREEMAIN) SUBPOOL_TOKEN(2E98D9B0
  ,000000F1) ADDRESS(xxxxxxxx) REMARK(SOCKET)
            TASK-25860 KE_NUM-006F TCB-S8014/009AFE88 RET-AF02AB70
  .
  SM 0302 SMGF  EXIT  - FUNCTION(FREEMAIN) RESPONSE(OK)
            TASK-25860 KE_NUM-006F TCB-S8014/009AFE88 RET-AF02AB70
  .
  SO 0803 SOSE  *EXC* - RECOVERY_ENTERED
  FUNCTION(SECURE_SOC_CLOSE) RESPONSE(DISASTER) REASON()
            TASK 25851 KE_NUM-006E TCB-S8012/009877F0 RET-AF003016
  .
  Additional Symptom(s) Search Keyword(s): DFHSOSE, 0C4/AKEX,
  CWXN, CLOSE SOCKET, KIXREVWJJ
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSO0001 An abend (code 0C4/AKEX) has  *
  *                      occurred at offset X'245E' in module    *
  *                      DFHSOSE.                                *
  ****************************************************************
  An HTTP client is sending a request to CICS/TS over an SSL
  connection with a "Connection: close" header. A CWXN task is
  started and does an attach for an ALIAS transaction.
  The CWXN task get suspended during task termination.
  The ALIAS transaction runs and sends the response to the client.
  During task termination of the ALIAS a socket close is issued.
  All task associations are removed from the socket.
  The ALIAS transaction gets suspended.
  The CWXN transaction is given control and does a socket
  relinquish call. Because there are no task associations, the
  socket is marked to be closed.
  The ALIAS freemains the socket and all its associated storage.
  before terminating.
  CWXM makes a secure socket close call resulting in an abend 0C4
  in DFHSOSE.
  

Problem conclusion

• DFHSOLT RELINQUISH (DFHSOS14) has been changed so that the CWXN
  task will no longer attempt to close the socket in this
  situation.
  

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:

  UI53624 UI53625

Modules/Macros

• DFHSOAD  DFHSOCK  DFHSODM  DFHSODUF DFHSOIS  DFHSOL   DFHSOLI
  DFHSOLS  DFHSOLX  DFHSOLX6 DFHSOM01 DFHSOM02 DFHSOM03 DFHSOPL
  DFHSORD  DFHSOS00 DFHSOS01 DFHSOS02 DFHSOS03 DFHSOS04 DFHSOS05
  DFHSOS06 DFHSOS07 DFHSOS08 DFHSOS09 DFHSOS10 DFHSOS11 DFHSOS12
  DFHSOS13 DFHSOS14 DFHSOS15 DFHSOS16 DFHSOS17 DFHSOS18 DFHSOS19
  DFHSOS20 DFHSOS21 DFHSOS22 DFHSOS23 DFHSOSE  DFHSOST  DFHSOTB
  DFHSOTI  DFHSOTRI DFHSOUE  DFHSOXM
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI53624

     UP18/03/01 P F802

• R100 PSY UI53625

     UP18/03/01 P F802

Fix is available

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