PK28697: INITPARM DEFAULTS TO ZERO, CAUSING TASK LOOPING

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If the two Link3270 clean-up routines (DFHMALSC and DFHMALFC)
  are included in the PLT and you fail to define the INITPARM to
  set an appropriate start interval, CICS will enter into the
  following looping behavior:
  As soon as CICS starts up two tasks run, end, and immediately
  restart.  This looping can prevent users from logging on, and
  results from the start interval default of '0'.
  

Local fix

• Make sure you code a correct INITPARM value to set appropriate
  start interval(s).
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS SFR users                           *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS loops when running the CICS SFR    *
  *                      LINK3270 clean-up routines via the      *
  *                      startup PLT.                            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In CICS SFR, when the LINK3270 clean-up routines DFHMALFC and/or
  DFHMALSC are specified in the startup PLT, if no start interval
  is specified for these programs in an INITPARM SIT override,
  this can lead to CICS going into a tight loop.
  This is due to the start interval defaulting to zero, which
  causes the programs to be restarted again immediately.
  

Problem conclusion

• CICS SFR LINK3270 clean up modules DFHMALSC and DFHMALFC have
  been amended such that if a start interval of less than 5
  minutes is specified, or no start interval is specified at all,
  the start interval will be defaulted to 5 minutes.
  :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
  The CICS Service Flow Runtime Version 3 Release 1 User's Guide
  (SC34589906) will be updated as follows:
  .
  Chapter 2, "Installing the CICS Service Flow Runtime", on page
  23 in the section entitled "Configuring the autostart procedure
  for the Link3270 Facility State Cleanup programs", the "Note"
  at the bottom of Point 2. should be amended to read as follows:
  :
  Caution should be taken when setting the SI parameter. Since too
  low a setting can cause a negative performance impact, you
  should be aware that unless you set the parameter to at least 5
  minutes, i.e., SI=300 (300 seconds), your settings will be
  ignored and reset to 5 minutes.
  :
  

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:

  UK19195

Modules/Macros

•    DFHMALFC DFHMALSC
  

Fix information

• Fixed component name

  SERVICE FLOW FE

• Fixed component ID

  5655M1502

Applicable component levels

• R200 PSY UK19195

     UP06/10/28 P F610

Fix is available

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