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Re: [eclipselink-users] @OptimisticLocking => NullPointerException
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What version of EclipseLink?
Please provide the full stack trace.
What object is involved, how is it mapped?
On 01/07/2013 12:22 PM, Michael Hönnig wrote:
Dear EclipseLink community,
We are getting a NullPointerExcption when using @OptimisticLocking.
org.eclipse.persistence.internal.descriptors.CascadeLockingPolicy
is the class where it happens:
CascadeLockingPolicy.initUnmappedFieldsQuery(...) {
...
SQLSelectStatement statement = new SQLSelectStatement();
Iterator<DatabaseField> itUnmappedFields =
m_unmappedQueryKeyFields.values().iterator();
...
}
called by
CascadeLockingPolicy.initUnmappedFields(...) {
...
if(m_unmappedQueryKeyFields.isEmpty()) {
m_unmappedQueryKeyFields = null;
m_mappedQueryKeyFields = m_queryKeyFields;
}
initUnmappedFieldsQuery(uow);
...
}
Just 2 statements before initUnmappedFieldsQuery() is using
m_unmappedQueryKeyFields, it is set to null.
Is ths a bug or does anybody know which circumstances, e.g. annotations in our
entities, could lead to this problem?`
Best regards
... Michael
