Generating identifiers by using sequence table may fail during sequence table
initialization
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Key: OPENJPA-1372
URL: https://issues.apache.org/jira/browse/OPENJPA-1372
Project: OpenJPA
Issue Type: Bug
Components: jdbc, kernel
Affects Versions: 2.0.0-M3, 1.2.1
Reporter: Milosz Tylenda
When sequence table does not exist and mutliple threads get EntityManagers from
EntityManageFactory, an insert into sequence table may fail because of
duplicate primary key value.
EMF is created lazily by default and users reported various problems with
concurrent initialization (e.g. failures in resolving aliases in JPQL queries,
IIRC) of EMF. This issue might have the same roots.
Issue and test case originally reported by Pinaki in OPENJPA-466.
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