PH55525: 0C4/AKEX PROGRAM CHECK IN DFHWBCL AT OFFSET X'AB8E'

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A user transaction was running and performing an E.C.WEB SEND.
  The related Receive gets a "HTTP/1.1 500 Internal Server
  Error.." message and subsequently a program check 0C4/AKEX
  appears in DFHWBCL at offset x'AB8E'.
  
  CICS was attempting to perform HTTP expect processing, this
  sends the headers of the request plus a special Expect:
  100-continue header. In this case the server returned a 500
  internal server error and when CICS attempts to receive this it
  does this into a null buffer rather than using a new SET BUFFER.
  

Local fix

• Circumvention:
  If the EXPECT processing isn't required, the ACTION(EXPECT)
  could be removed in the WEB SEND command and that should stop
  the 0C4 occurring.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: An abend (code 0C4/AKEX) in DFHWBCL.    *
  *                      A transaction issuing EXEC CICS WEB     *
  *                      SEND FROM() with the ACTION(EXPECT)     *
  *                      option abends AEXZ.                     *
  ****************************************************************
  An EXEC CICS WEB SEND FROM() with the ACTION(EXPECT) option is
  issued.  ACTION(EXPECT) sends the server the headers and the
  server should respond with a 100 continue.
  The server responds to the request with 'HTTP/1.1 500 Internal
  Server Error' and a response body with some content.
  In the client region there is an abend 0C4/AKEX in DFHWBCL and
  the user transaction terminates with abend AEXZ.
  

Problem conclusion

• DFHWBCL will no longer suffer an 0C4 when the server responds
  with a 'HTTP/1.1 500 Internal Server Error'.
  

Temporary fix

Comments

APAR Information

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

  PH52146

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

  UI92897

Modules/Macros

• DFHWBCL  DFHWBCLI DFHWBDUF DFHWBSO  DFHWBSV  DFHWBXM
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI92897

     UP23/07/28 P F307

Fix is available

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