[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5773) Session grows with long running transactions, even when flushing and clearing regularly

[Emond Papegaaij (JIRA)]

Session grows with long running transactions, even when flushing and clearing regularly
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                 Key: HHH-5773
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5773
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.6.0
            Reporter: Emond Papegaaij


The session keeps track of all changes to entities in the 'actionQueue'. This ActionQueue contains a AfterTransactionCompletionProcessQueue, which grows rapidly with every change/insert/delete of entities. There seems to be no way to clear this queue, other than to commit or rollback. I can understand that Hibernate needs to keep track of changes in a transaction, but this list should not hold references to entities. Perhaps references can be replaced by lazy proxies?

In our case, we are trying to import many (millions) records into the database. This needs to be performed in a single transaction. These records reference entities in a complex (and large) data-structure. The entities in this structure are not modified, but as the ActionQueue contains all newly inserted records, which in turn reference the entities in this structure, the entire structure ends up in the session. Flushing and clearing has no effect.

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