PK42608: DB2OBJECTUSAGE MONITORING CAN CAUSE "UNEXPECTED OBJECT IN DESTUBIFY" EXCEPTIONS IN SERVER LOG UNDER CERTAIN CONDITIONS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Preconditions for Problem:
  1. Db2ObjectUsage monitoring is active (the default),
  2. CAE Agent is up while either the CAE Server is restarted, or
    there is a temporary loss of communication with the CAE Server
  3. A Db2Object alert ("Object Buffer Pool Hit Ratio Problem" or
     "Object Synchronous IO Delay Problem") occurs before the loss
     of communication.
  4. The same Db2Object alert (for the same SQL Statement) occurs
     after the loss of communication.
  .
  If these conditions are met, then the CAE Server log will
  contain messages of the following kind:
  .
  [06:29:53.990]
  WARNING: Unexpected Object in destubify
  .
  java.lang.ClassCastException
  at
  com.rocketsoft.nm.model.software.db.DbVirtualElementImpl.destubi
  fy(DbVirtualElementImpl.java(Inlined Compiled Code))
  at
  com.rocketsoft.nm.model.software.db.DbVirtualElementImpl.getDoma
  inElementReference(DbVirtualElementImpl.java(Compiled Code))
  at
  com.rocketsoft.nm.qm.model.Db2ObjectUsageImpl.getDomainElementRe
  ference(Db2ObjectUsageImpl.java(Compiled Code))
  at
  com.rocketsoft.nm.blackboard.DefaultBlackboardDatabase.save(Defa
  ultBlackboardDatabase.java(Compiled Code))
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM DB2 Query Monitor.          *
  ****************************************************************
  * PROBLEM DESCRIPTION: DB2OBJECTUSAGE MONITORING CAN CAUSE     *
  *                      "UNEXPECTED OBJECT IN DESTUBIFY"        *
  *                      EXCEPTIONS IN SERVER LOG UNDER CERTAIN  *
  *                      CONDITIONS                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Code changes have been made to address these issues.
  

Problem conclusion

• Apply PTF.
  

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:

  UK26940 UK26941

Modules/Macros

•    CQMBLOB  CQMCAEPT CQMJAR   CQMPTPX  CQMSSV
  CQMSWD   CQMUPXPT
  

Fix information

• Fixed component name

  DB2 QUERY MONIT

• Fixed component ID

  5655E6701

Applicable component levels

• R220 PSY UK26940

     UP07/07/15 P F707

• R221 PSY UK26941

     UP07/07/15 P F707

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.