PH54742: DFHWB0002 CODE X'071D' AFTER EXEC CICS WEB RECEIVE SET MAXLENGTH

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The application issues an EXEC CICS WEB RECEIVE SET MAXLENGTH
  and begins processing the incoming response which was returned
  to CICS in chunks. A single chunk was used to send the entire
  response body and the length of this chunk matches the MAXLENGTH
  value exactly. CICS then needs to receive the zero-length chunk
  which indicates the end of the data. Since the entire chunk
  fits into a single chunk, the zero-length chunk is incorrectly
  triggering the excess chunks processing which needs to obtain a
  buffer to hold the excess chunk data. This leads to a GETMAIN
  with a length of 0 and that causes the DFHWB0002 message.
  
  Additional Symptoms / Search Keywords: KIXREVPAD
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: EXEC CICS WEB RECEIVE SET MAXLENGTH     *
  *                      causes DFHWB0002 code(x'071D') message  *
  *                      and system dump.                        *
  ****************************************************************
  A CICS application has made an outbound HTTP request.  An EXEC
  CICS WEB RECEIVE SET MAXLENGTH command was used to receive the
  response.  The response returned from the server was in a single
  chunk.  The length of that chunk was exactly the same as the
  MAXLENGTH specified by the application.
  
  DFHWBCL receives the chunk and returns it in a SET buffer of the
  requested size.  After that has been done an attempt is made to
  process any additional chunked data that may be present.  A new
  buffer is acquired for that processing, but as there is no more
  data a GETMAIN with length 0 is attempted.
  
  The GETMAIN fails and gets reported in message DFHWB0002
  code(x'071D') and a system dump is taken.
  
  It is also possible for the WEB RECEIVE command to suffer an
  AEXZ abend.  The cause of the abend is DFHAP0001 An abend (code
  0C4/AKEX) has occurred at offset X'05FC' in module DFHCV64.
  

Problem conclusion

• DFHWBCL has been changed to correctly process a chunked response
  when the MAXLENGTH value on the WEB RECEIVE command is the exact
  size of the chunked response.
  

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:

  UI92405

Modules/Macros

• DFHWBCL
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI92405

     UP23/06/24 P F306

Fix is available

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