[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6689) DefaultMergeEventListener changes CheckNullability flag - not thread save

[John SMith (JIRA)]

DefaultMergeEventListener changes CheckNullability flag - not thread save
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                 Key: HHH-6689
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6689
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.6.5
         Environment: Websphere Application Server 7.0,  DB2,  Windows Server, Hibernate 3.6.5
            Reporter: John SMith


saveTransientEntity() method saves the CheckNullability setting,  changes it using the getFactory().getSettings().setCheckNullability  method, and does save processing.   After save processing, the saved value is restored.

During load testing, we have had situations where the CheckNullability becomes set to TRUE and causes failures because of null checks.

It has been difficult to debug, but it appears that this is not thread safe - multiple threads accessing this method can change the value of this setting.

It can also be that a database error can cause an exception that will cause the checkNullability flan not to be reset.

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