IC76634: TPC MAY FAIL TO COLLECT INITIAL STATISTICS FILES WHEN RUNNING AN SVC PERFORMANCE MONITOR WITH INTERVAL SET LONGER THAN 5 MINUTES

4.2.1 Interim Fix 1 (November 2011) for Tivoli Storage Productivity Center

APAR status

• Closed as program error.

Error description

• DETAILS OF PROBLEM:
  TPC Performance Monitor job fails to retrieve Statistic files as
  "not found" when TPC requests them.  This may occur for a new
  SVC Performance Monitor and also when re-enabling an existing
  SVC PM job.
  When collecting Performance Monitor statistics files using SVC
  CLI over SSH method (not CIMOM), retrieving statistics files may
  fail with a message stating the Stats files are not available.
  Example: When collecting data from SVC with 15 minute interval,
  a new set of statistics files should become available anytime
  within the 15 minute interval.  Statistics files may become
  available on the config-node much earlier than the 15 minute
  mark. TPC will not look for the files the 15 minute mark.  TPCs
  mechanism to determine whether the statistics files are too old
  may cause the current statistics to be marked as "old".  As a
  result the set of statistics files will not be selected as they
  are older expected.
  The performance monitor job will show this error for the first
  and subsequent failed collection attempts in TPC logs:
  "HWNPM2052E: No performance data was collected from device SVC
  NAME for the current collection interval due to an error. The
  previous polling interval with data was at (null)."
  .
  Recreate Steps: Difficult to recreate this problem as it's a
   timing related out of sync situation.
  

Local fix

• Problem as described by customer: TPC performance monitor jobs
  fail and are unable to collect statistics as expected.
  Initial customer impact (low/med/high):   med
  Local Fix:  n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: TPC 4.2.x customers running SVC              *
  *                 performance data collection with 15          *
  *                 minutes interval.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: This problem might occur with a new     *
  *                      SVC Performance Monitor when            *
  *                      statistics files are not available      *
  *                      when TPC requests them.  The            *
  *                      performance monitor job will show       *
  *                      this error for the first and            *
  *                      subsequent failed collection attempts.  *
  *                      "HWNPM2052E: No performance data was    *
  *                      collected from device SVC NAME for      *
  *                      the current collection interval due     *
  *                      to an error. The previous polling       *
  *                      interval with data was at (null)."      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  -
  

Problem conclusion

• The error message "HWNPM2052E" will be seen once for the first
  sample but the data should be collected for the subsequent
  attempts.  The fix for this APAR is targeted for the following
  maintenance packages:
  
  | fix pack | 4.2.1-TIV-TPC-FP0004 - target August 2011
  
  http://www-01.ibm.com/support/docview.wss?&uid=swg21320822
  
  The target dates for future fix packs do not represent a formal
  commitment by IBM. The dates are subject to change without
  notice.
  

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

  MDM PERFORMANCE

• Fixed component ID

  5648GPC01

Applicable component levels

• R420 PSY

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