PM32654: CICS SOCKET SEND IS NOT TIMED OUT FOR IS7 ERROR RESPONSE TO THE CLIENT OVER IPIC CONNECTION.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You have a IPIC connection from CICS to CTG, and the mirror
  task is abending AITJ. The mirror task sends an IS7 error
  response and remains in a SOCKET SEND wait as the client is
  unable to respond.
  While in a SOCKET SEND wait, this task holds lock IS..1111
  EXCLusively. Many other tasks to the CTG, also wait
  for the lock EXCL, thus leading to MXT. The Socket send
  wait is never timed out.
  Additional Symptoms and Keywords: KIXREVSCB TIMEOUT_TYPE
  DEADLOCK_DELAYED hang hung SEND_IS7 ABENDAITJ
  Looking at the send AIOCB, the AIORC at Offset x'44' is
  0000044F EINPROGRESS , (still active).
  Stack for the outstanding mirror task.
  0600 Dom  9B71F900 9B7228F8 002FF8 DFHISIS
       Int   +002BF8 9B71FBB8 0002B8
                                     DFHISIS_SEND_ERROR
  0330 Sub  9B75CA40 9B75D816 000DD6 DFHISZA
       Int   +000B10 9B75CC98 000258 DFHISZA_SEND_ERROR
       Int   +000BE6 9B75D61C 000BDC SEND_IS7
  0B30 Sub  9B729F18 9B72B0F8 0011E0 DFHISSR
       Int   +000BCA 9B72A1D4 0002BC DFHISSR_SEND_RESPONSE
       Int   +0010E0 9B72AC5E 000D46 DFHISSR_WRITE_RESPONSE
  0A00 Dom  9BAAFF48 9BAB35A2 00365A DFHWBSV
       Int   +00068C 9BAB04FA 0005B2 WBSV_WRITE_RESPONSE_ROUTINE
       Int   +00345C 9BAB05E0 000698 WBCM_WRITE_MESSAGE
  0FC0 Dom  9BA04C00 9BA06DC2 0021C2 DFHSOCK
       Int   +001C0C 9BA04E68 000268 SEND_SOCK
       Int   +00216A 9BA06B4E 001F4E TCPIP_SEND
  04E0 Sub  9BA232F0 9BA23918 000628 DFHSOS06
  0370 Dom  9A90F5B0 9A911ABA 00250A DFHDSSR
       Int   +001506 9A90F8FC 00034C POP_TASK
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: A mirror task stuck sending an          *
  *                      IS7 to a client cannot be timed out or  *
  *                      purged.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An IPIC attached mirror task attempts to send a normal response
  to a client. The socket SEND hangs due to problems at the client
  end. Eventually this SEND times out due to DTIMOUT. The mirror
  task is abended AITJ. During transaction termination, an attempt
  is made to send an IS7 to the client. This SEND also hangs.
  However, the task is now purge protected as it is in transaction
  termination. DTIMOUT is therefore prohibited and in fact the
  task cannot be PURGED/FORCEPURGED or KILLED. Other tasks back up
  behind the first task trying to send down the same socket
  causing a backlog of tasks in CICS.
  ADDITIONAL KEYWORDS :- MAXTASKS abendAITJ CTG gateway IS7
                         hang hung
  

Problem conclusion

• DFHISZA and DFHISSR have been altered to pass a default
  TIME_OUT_VALUE of 5 seconds when sending an IS7 to a client.
  DFHWBSV has been altered to pass this value to DFHSOCK
  as the timeout_value on the existing socket send.
  
  The CICS Transaction Server for z/OS Version 4 Release 1
  Diagnosis Reference manual, GC34-7038-01, has been altered
  as follows:
  
  In Chapter 112, Web Domain (WB), in the section
  'WBSV gate, WRITE_RESPONSE function' on page 1895,
  add the following input parameter:
  
  TIME_OUT_VALUE
   This is the time_out_value to be applied to the socket
  SEND for the response.
  

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:

  UK66105

Modules/Macros

•    DESISSR  DESISZA  DESWBCM  DESWBSV  DFHISSR
  DFHISSRA DFHISSRM DFHISSRT DFHISZA  DFHISZAA DFHISZAM DFHISZAT
  DFHWBSV  DFHWBSVA DFHWBSVB DFHWBSVM DFHWBSVT
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK66105

     UP11/04/07 P F104

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.