PK20481: TCPIPSERVICE CLOSED AFTER DFHSO0114 INCORRECTLY DISPLAYED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A timing window problem exists where a CWXN task can run to
  completion (and suffer a client connection error) before the
  CSOL task can issue its Socket.relinquish call.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: TCPIPSERVICE closed after message       *
  *                      DFHSO0114 is incorrectly displayed.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The sockets listener task ( CSOL ) attaches a CICS web receiver
  task ( CWXN ) in response to a new connection from an HTTP
  client. CWXN runs immediately and encounters an error as the
  client has closed the connection. CWXN terminates and
  dissociates itself from the CICS socket object before CSOL
  relinquishes its reserve on the socket. When CSOL relinquishes
  its reserve, there are no other CICS tasks referencing the
  socket.
  As no socket receive is in progress the doclose flag is set
  indicating that the client socket should be closed.
  .
  The doclose flag causes CSOL to assume that there is a basic
  problem with the TCPIPSERVICE environment so it then closes
  the TCPIPSERVICE. This action is inappropriate in these
  circumstances.
  
  ADDITIONAL KEYWORDS : MSGDFHSO0114 DFHSO0108 MSGDFHSO0108
  

Problem conclusion

• DFHSOLS has been changed so that it no longer attempts to close
  the TCPIPSERVICE just because it has been told to close a
  newly connected client socket.
  

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:

  UK14443

Modules/Macros

•    DESIIRR  DESSOLS  DESSOSO  DESWBSO  DFHIIRR
  DFHSOLS  DFHSOSOC DFHSOS00 DFHSOS01 DFHSOS02 DFHSOS03 DFHSOS04
  DFHSOS05 DFHSOS06 DFHSOS07 DFHSOS08 DFHSOS09 DFHSOS10 DFHSOS11
  DFHSOS12 DFHSOS13 DFHSOS14 DFHSOS15 DFHSOS16 DFHSOS17 DFHSOS18
  DFHSOS19 DFHSOS20 DFHSOS21 DFHSOS22 DFHSOS23 DFHWBSO
  

Fix information

• Fixed component name

  CICSTS 3.1 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK14443

     UP06/05/16 P F605

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.