PK91191: HTTP OPTIONS REQUEST IS REJECTED WITH 405 METHOD NOT ALLOWED IF A NON-DEFAULT PORT AND A PROXY SERVER IS BEING USED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• HTTP OPTIONS request is rejected with 405 Method not allowed
  on the cics command WEB OPEN if a non-default port and a Proxy
  server is being used.
  The problem here is that the response to the OPTIONS request
  contains a Proxy-Connection header which DFHWBCL doesn't handle.
  DFHWBCL is expecting a Connection header.  Consequently DFHWBCL
  doesn't detect  that the connection is about to be closed by
  the proxy server.
  

Local fix

• na
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS fails to close the connection to a *
  *                      remote server on receipt of a           *
  *                      "Proxy-Connection: close" header.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A CICS application is making an outbound HTTP request via a
  proxy. A WEB OPEN command is issued which causes an OPTIONS
  request to be built and sent via the proxy to the remote server.
  The OPTIONS request gets rejected with an "HTTP/1.1 405 Method
  Not Allowed" response, and the remote server returns a
  "Connection: close" header.
  The proxy modifies the close header to be "Proxy-Connection:
  close" to indicate that the connection to the proxy server will
  be closing.
  CICS doesn't recognize the "Proxy-Connection: close" header , it
  was expecting to see "Connection: close", and consequently the
  connection is left open.
  The application then issues a WEB CONVERSE command. The SEND
  works but the proxy then closes the connection causing the
  RECEIVE to fail with CONNECTION_CLOSED.
  
  Additional keywords: AEIQ ABENDAEIQ AEIP ABENDAEIP
  

Problem conclusion

• CICS has been changed so that it recognizes the
  "Proxy-Connection: close" header and will now close and re-open
  the connection.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PK83596

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

  UK48535

Modules/Macros

• DESWBCL  DFHWBCL
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK48535

     UP09/07/28 P F907

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.