PM64825: MULTIPLE SUBQUERY IN @ONETOMANY LEADS TO STACKOVERFLOWERROR IN JPA 2.0

8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• Error Description:
  https://issues.apache.org/jira/browse/OPENJPA-1974
  
  JPQL with multiple subquery in @OneToMany annotated collection
  property with eager fetch configuration, StackOverflowError is
  thrown.
  
  java.lang.StackOverflowError
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2166)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
   ...
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.0.0 who make use of subqueries    *
  *                  involving eager @OneToMany collections.     *
  ****************************************************************
  * PROBLEM DESCRIPTION: StackOverflowError when performing      *
  *                      multiple subquery in collection field   *
  *                      with eager fetch.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following StackOverflowError is thrown when running a JPQL
  query with multiple subqueries in an @OneToMany annotated
  collection property with eager fetch configuration:
  java.lang.StackOverflowError
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2166)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2160)
  at
  org.apache.openjpa.jdbc.sql.SelectImpl.aliasSize(SelectImpl.java
  :2168)
  

Problem conclusion

• With this fix code has been added to OpenJPA to fix the
  StackOverflowError which can occur when executing a JPQL query.
  
  The fix for this APAR is currently targeted for
  inclusion in Service Level (Fix Pack) 8.0.0.6 of WebSphere
  Application Server version 8.0.0.
  
  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:

  PM62447

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R800 PSY

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