PH41055: STORAGE LEAK WHILE RUNNING DRIVER PACKAGES WITH INCORRECT CLIENTAPPLCOMPAT SETTING 21/12/15 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A Storage leak could occur while running driver packages with
  incorrect clientApplcompat setting.
  In this case, the problem comes up while running an old driver
  and its JCC Package rebound with APPLCOMPAT(V12R1M501).
  It could also occur when using a newer driver if
  clientApplcompat property is set higher than what the Package is
  bound with.
  As external symptom was observed:
  DSNT500I  -DB2  DSNGEPLC RESOURCE UNAVAILABLE
             REASON 00C90089
             TYPE 00000605
             NAME EDM RUNTIME ABOVE SPACE
  After analyzing the dump it turned out that ADMF AGL V64 PHB
  storage pool was filled by thousands of DSNGEGFB Control Blocks
  with eyecatcher EDMP.
  
  ADDITIONAL SYMPTOMS:
  SQLSTORAGE DB2STGLK/K
  

Local fix

• BYPASS/CIRCUMVENTION:
  A possible workaround is to bind the Packages with APPLCOMPAT
  V11R1.
  In general, workaround is to upgrade the driver and set
  clientApplcompat to a value lower than or equal to the Packages.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Db2 12 for z/OS users of remote SQL                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * STORAGE LEAK WHILE RUNNING DRIVER                            *
  * PACKAGES WITH INCORRECT                                      *
  * CLIENTAPPLCOMPAT SETTING                                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply corrective PTF when available                          *
  ****************************************************************
  A Storage leak could occur while running driver packages with
  incorrect clientApplcompat setting.
  In this case, the problem comes up while running an old driver
  and its JCC Package rebound with APPLCOMPAT(V12R1M501).
  It could also occur when using a newer driver if
  clientApplcompat property is set higher than what the Package
  is bound with.
  As external symptom was observed:
  DSNT500I  -DB2  DSNGEPLC RESOURCE UNAVAILABLE
             REASON 00C90089
             TYPE 00000605
             NAME EDM RUNTIME ABOVE SPACE
  After analyzing the dump it turned out that ADMF AGL V64 PHB
  storage pool was filled by thousands of control blocks
  with eyecatcher EDMP.
  Prior to the abend, these remote applications receive SQLCODE
  -30025.  When this occurs, the package storage is allocated in
  the agents private storage, above-the-bar storage pool, but it
  is not freed.
  

Problem conclusion

• Db2 is modified to free the package storage when the
  clientapplcompat check fails.
  ADDITIONAL SYMPTOMS:
  SQLSTORAGE DB2STGLK/K SQLCODE30025
  

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:

  UI78742

Modules/Macros

• DSNXEPM
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RC10 PSY UI78742

     UP22/01/05 P F201 ­

Fix is available

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