IV11717: UA SITUATION W/ MISSING FUNCTION MAY PRODUCE A FALSE POSITIVE

IBM Tivoli Monitoring 6.2.2 Fix Pack 8 (6.2.2-TIV-ITM-FP0008)
IBM Tivoli Monitoring 6.2.2 Fix Pack 9 (6.2.2-TIV-ITM-FP0009)

APAR status

• Closed as program error.

Error description

• Environment:
  ITM Universal Agent 622FP5
  
  Problem Description:
  UA Situation w/ MISSING function may produce a false positive.
  The case for the false positive is when UA has a set of data
  rows in its cache and said data rows are NOT missing the
  specific attribute value that MISSING() function is testing for,
  yet the situation fires anyway.
  
  Detailed Recreation Procedure:
  1. Install and configure UA 622FP5 on Windows or *nix system.
  2. Set up an situation for that UA with  MISSING function.
  3. Start that situation,you will find it will be fired one time
  at every startup of this situation, although it doesn't match
  the fired condition.
  

Local fix

Problem summary

• Situation with MISSING function may product a false positive.
  
  When running a Situation that uses MISSING() function against a
  Universal Agent application where current, monitored attribute
  value(s) is/are not missing, the Situation will incorrectly
  evaluate as true, thus marked as 'open' state.  This behavior is
  most readily observed when stopping and then restarting the
  Situation at a time when attribute at issue is not missing the
  value(s) of interest.
  
  SPECIAL NOTE:  This APAR fix does not prevent a Situation using
  MISSING() function from false positive in case where there are
  no data rows present in memory cache for the associated
  Universal Agent application.  This particular scenario will be
  addressed in a future TEMA release.
  

Problem conclusion

• Universal Agent data row processing was modified for case of
  situation that contains MISSING() function so that current data
  rows of associated Universal Agent application are always sent
  to the TEMA framework for evaluation by the MISSING() function;
  this design change eliminates the behavior of false positive
  Situations that contain MISSING() function.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  
      | fix pack | 6.2.2-TIV-ITM-FP0008
      | fix pack | 6.2.3-TIV-ITM-FP0002
  

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:

Fix information

• Fixed component name

  UNIVERSAL AGENT

• Fixed component ID

  5724K1000

Applicable component levels

• R622 PSY

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