PH40930: ADD MESSAGES TO CICS TO INDICATE WHEN INBOUND TCPIP TRAFFIC IS BEING ACCEPTED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS does not issue any message when it is able to start
  accepting inbound TCP/IP connections.  Similarly CICS does not
  issue any message to state when connections are no longer being
  accepted.
  
  The ability to accept inbound traffic requires both the socket
  listener to be active and the associated TCPIPSERVICE to be
  OPEN.  These can occur at different times and the presence of
  the DFHSO0107 message that indicates a TCPIPSERVICE has been
  opened, does not mean that connections can immediately arrive
  and be processed.
  
  This APAR has been raised to add new messages to the CICS
  socket listener task that indicate when it is ready to accept
  new connections and when that has stopped.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS does not issue messages to make it *
  *                      clear when inbound TCP/IP connections   *
  *                      are able to be accepted.                *
  ****************************************************************
  During CICS initialisation TCPIPSERVICEs may be installed from
  GRPLIST, recovered from the catalog, or created by a PLT
  program (e.g. CPSM BAS install).  When the TCPIPSERVICE status
  is set to OPEN, message DFHSO0107 gets issued.
  
  The DFHSO0107 message does not mean that new inbound connections
  could be accepted for those TCPIPSERVICEs.  Inbound connections
  are only able to be accepted when the CICS socket listener
  (CSOL) task enters its main work loop.  This will happen at the
  end of CICS initialisation but there is no corresponding message
  issued by CICS to make it obvious.
  

Problem conclusion

• The CICS socket listener has been changed to issue 3 new
  messages.  These messages will show when inbound connections are
  able to be accepted.
  
  The new messages are;
  
  DFHSO0200I applid The CICS socket listener task is now accepting
  inbound TCP/IP connections.
  
  DFHSO0201I applid The CICS socket listener task has stopped
  accepting new inbound HTTP connections.
  
  DFHSO0202I applid The CICS socket listener task has stopped
  accepting all inbound TCP/IP connections.
  

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:

  UI77856 UI77857

Modules/Macros

• DFHMESOC DFHMESOE DFHMESOK DFHSOLS
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R200 PSY UI77857

     UP21/10/30 P F110

• R300 PSY UI77856

     UP21/10/30 P F110

Fix is available

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