PI50389: CONVERTTOJSONPRIMITIVE DATA TRANSFORMATION PART OF Z/OS CONNECT USES HIGH CPU

8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• z/OS Connect consumes excessive CPU amounts.  It was found
  that
  the method convertToJSONPrimitive is very expensive.  In
  this
  testcase it accounts for nearly a third of the cumulative
  samples.  This APAR is to optimize this method so it uses
  less
  CPU.
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile for z/OS using z/OS  *
  *                  Connect's data transformation support.      *
  ****************************************************************
  * PROBLEM DESCRIPTION: High CPU caused by                      *
  *                      convertToJSONPrimitive when using z/OS  *
  *                      Connect's data transformer.             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  High CPU usage is observed when processing a high volume of
  requests through z/OS Connect and when using z/OS Connect's data
  transformer. More specifically, the problem takes place because
  inefficient processing under convertToJSONPrimitive method,
  which is part of the data transformation tooling that z/OS uses.
  The tooling used to analyze the high CPU highlights the
  mentioned method as a potential cause.
  

Problem conclusion

• Code was added to make convertToJSONPrimitive more efficient.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 8.5.5.8.  Please refer to the Recommended Updates page for
  delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  LIBERTY PROF -

• Fixed component ID

  5655W6514

Applicable component levels

• R850 PSY

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