PH42380: THROUGHPUT PERFORMANCE DEGRADATION IN ECLIPSELINK 2.7.9 AND 3.0.1

APAR status

• Closed as program error.

Error description

• Simple REST/JPA applications, running on open liberty with
  EclipseLink 2.7.9 or EclipseLink 3.0.1, is experiencing a
  75%
  throughput performance degradation (~26k req/sec down to ~6k
  req/sec) while running JPA queries.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server - Java Persistence API - JPA 2.2 /   *
  *                  JPA 3.0 & EclipseLink                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: EclipseLink 2.7 and 3.0 contain a       *
  *                      severe performance degradation          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A community submitted change to EclipseLink added several java
  `Thread.getStackTrace() ` calls that created a severe throughput
  performance degradation.
  

Problem conclusion

• The fix for this APAR changes the EclipseLink implementation and
  involves an update to the third-party source. See
  https://github.com/eclipse-ee4j/eclipselink/issues/1343.
  
  This fix is currently targeted for WebSphere Liberty 21.0.0.12.
  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 PROFILE

• Fixed component ID

  5724J0814

Applicable component levels