PM07816: CONNECTION: KEEP-ALIVE HEADER IS ALWAYS SENT FROM THE RESPONSE BUILT BY CICS.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The client sends a request to CICS with a http header
  Connection:Keep-Alive.  CICS then closes the connection
  yet our response includes the "Connection: Keep-Alive"
  header.  When the client attempts another request using
  the same connection, it fails.
  CICS will always close the connection on VSE.  However,
  the code that builds up the HTTP response currently
  always adds a Connection: Keep-Alive header if the
  client sent one in.  This APAR will will remove the
  Connection: Keep-Alive header from the response built
  by CICS.
  Additional Symptom(s) Search Keyword(s):
  KIXREVSCB
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS Web Support returns a keep-alive   *
  *                      header to an application but closes     *
  *                      the connection.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The CICS Web Support for CICS TS for VSE/ESA does not support
  persistent connections, but DFHWBBLI will cause a Connection
  Keep-Alive header to be placed in the output data in some
  circumstances before closing the socket.
  
  While this does not cause a problem for the typical browser
  session, a customer application may identify this header
  and expect that the connection is still active.
  

Problem conclusion

• DFHWBBLI has been changed to avoid the Keep-Alive header being
  added.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

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

  UK57109

Modules/Macros

•    DESWBAP  DESWBBLI DESWBDM  DESWBRQ  DESWBSR
  DESWBXM  DFHWBAP  DFHWBAPF DFHWBBLI DFHWBDM  DFHWBRQS DFHWBSR
  DFHWBXM
  

Fix information

• Fixed component name

  CICSTS FOR VSE

• Fixed component ID

  564805400

Applicable component levels

• RB0P PSY UK57109

     UP10/05/24 P E430

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.