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https://issues.apache.org/jira/browse/OPENJPA-466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672404#action_12672404
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Tim McConnell commented on OPENJPA-466:
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Hi Joe, I think I'm finally able to replicate this error !! I haven't run it
yet on Oracle, but I'm consistently able to get this failure using postgresql.
Does this look similar to the error you're getting in Oracle ??
Caused by: <openjpa-2.0.0-SNAPSHOT-r422266:742775 nonfatal general error>
org.apache.openjpa.persistence.PersistenceException: ERROR: duplicate key value
violates unique constraint "entity_employee_pkey" {prepstmnt 17832855 INSERT
INTO ENTITY_EMPLOYEE (id, firstName, lastName, salary) VALUES (?, ?, ?, ?)
[params=(int) 273350, (String) First_name_1628, (String) Last_name_1628,
(float) 1628.0]} [code=0, state=23505]
> Primary key constraint violated using (Oracle) sequence to generate ID in
> multithreaded app
> -------------------------------------------------------------------------------------------
>
> Key: OPENJPA-466
> URL: https://issues.apache.org/jira/browse/OPENJPA-466
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 1.0.0, 1.0.1, 1.1.0, 1.2.0
> Environment: OpenJPA 1.0.0 (also tried 1.0.1 and 1.1.0-SNAPSHOT)
> Oracle XE 10g (JDBC driver 10.2.0.3.0)
> Windows XP Pro
> Reporter: Frank Le
> Assignee: Tim McConnell
> Priority: Blocker
>
> Here's how I annotate the ID:
> @Id
> @SequenceGenerator(name = "FooSeq", sequenceName = "seq_foo",
> allocationSize = 20)
> @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "FooSeq")
> private Long id;
> Here's how I create the (Oracle) sequence:
> CREATE SEQUENCE seq_foo START WITH 1 INCREMENT BY 1;
> I get a primary key unique constraint violated in a multithreaded app i.e. it
> doesn't happen in single-threaded!
> You can simply reproduce this error by either create blocking queue or
> blocking thread pool say size 5 to insert 10000+ object.
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