PI91757: When CDA encounters an internal error, it fails to clean up after itself, causing a storage leak

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• While there could be other errors, in the case at hand the
  module from which CDA is trying to retrieve DWARF data is
  managed by LLA, and the binder API doesn't support such modules.
  Binder API resources are not released, nor is memory used by CDA
  itself.
  
  A symptom of the leak is the buildup of control blocks with the
  eyecatcher IEWBSAD both below and above the line (abandoned
  binder API dialogs), and/or blocks with the ASCII eyecatcher
  31NX at offset +4 above the line.
  
  In the LLA case, adding an //IEWDIAG DD statement to the problem
  step will show messages like:
  
      IEW2809E D218 PROGRAM {program} CANNOT BE RETRIEVED BECAUSE
          CSVQUERY  INDICATES MODULE PROVIDER WAS LLAF INSTEAD OF
          PROGRAM  MANAGEMENT LOADER
      IEW2310E 1033 THE MODULE SPECIFIED BY EPTOKEN {token} COULD
          NOT BE  FOUND.
      IEW2124I 0058 3 1 INCLUDE RETURN = 8 REASON = 83000514.
  
  Caution: IEWDIAG output can be voluminous.
  
  FIXCAT keyword:  COB0501T/K  COB0502T/K  COB0601T/K  COB0602T/K
  

Local fix

• Compile without DWARF debugging information, for example with
  COBOL compile with NODWARF, or at COBOL v6.2+ with the SEPARATE
  option if debug information is desired.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Enterprise Cobol application users           *
  *                 where Cobol application modules              *
  *                 compiled with NOTEST(DWARF) are              *
  *                 managed by LLF.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Run out of memory due to memory         *
  *                      leaks built up at runtime.              *
  ****************************************************************
  Binder dialogs are open to load debug data for Cobol
  statement number. When the load module is in LLF,
  binder API fails, and the binder dialogs are not closed
  properly which leaves memory leaks.
  

Problem conclusion

• Apply service provided.
  

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:

  UI52893 PI92026 PI92027 PI96211

Modules/Macros

• CDADBGLD CDADUMP  CDAEDPI  CDAEDPIE CDAEED   CDAEEDE  CDAEQDPI
  CDAEQED  CDAHE002 CDAHLASM CDAHLMVS CDAMSGE  CDAMSGT  CDASOS
  

Fix information

• Fixed component name

  RUNTIME LIB EXT

• Fixed component ID

  56551210D

Applicable component levels

• R7A0 PSY UI52893

     UP17/12/27 P F712

Fix is available

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