PK27845: MODIFY COMMANDS TO CICS STOP WORKING. MESSAGE IEE342I MODIFY REJECTED - TASK BUSY ISSUED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Modify commands to CICS stop working.   At first they hang.
  Eventually they are rejected with message:
  IEE342I MODIFY   REJECTED-TASK BUSY
     In the joblog at the point where the Modify commands first
  started hanging, CICS issued this message:
  DFHCQ0001 B01CICS2 An abend (code ---/AKEC) has occurred at
   offset X'2472' in module DFHCQSY.   (DFHCQSY is at the UQ96518
  level.)
     This is much like CICS APAR PQ97756 (PTF UQ96518) but that
  fix is applied.
     It turns out that the PQ97756 fix does not cover all possible
  loops built into DFHCQSY.  In particular, if the Modify command
  input to CICS is frequent and constant enough so that there is
  never a point where all tasks initiated via console have
  completed, then DFHCQSY can still get the runaway task timeout
  even with PQ97756 applied.
  Additional Keywords: DFHCQ0001 IEE342
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: MODIFY commands stop working.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  MODIFY commands start to hang. Then they are rejected with
  MSGIEE342I MODIFY REJECTED - TASK BUSY.
  An ABENDAKEC in module DFHCQSY will be seen indicating the
  kernel (KE) domain has detected runaway. The kernel domain
  is assuming that DFHCQSY is in a loop, but it is actually
  servicing many console initiated tasks.
  
  Additional Keywords: 342I
  

Problem conclusion

• DFHCQSY has been altered so runaway task timeout cannot be
  triggered when it is processing CIBs.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PK23482

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

  UK17065

Modules/Macros

•    DESCQSY  DFHCQSY
  

Fix information

• Fixed component name

  CICSTS 3.1 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK17065

     UP06/08/15 P F608

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.