Interesting. It sounds to me like there are two problems here, with a common source:
o a (potentially) gigantic transaction is built up over a sequence of operations which should be unrelated; o a (potentially) gigantic queue of events which should be unrelated is built up within the curation run's Context. It sounds to me as though none of the tasks in the run is committing its work. The default curation scope is OPEN, so Curator is not committing. The event handler in question commits its own work, and in so doing, the first time it is called by the dispatcher, inadvertently commits all of the *other* curation work that should have been committed already. I can find no documentation for this, but it appears that event handlers should not commit work. The design of Context seems to depend on this. If true, we should document this requirement thoroughly. ++++++++++++++++++ It seems to me that a task designed to be run in OPEN scope must commit its own work. There is, however, a problem with this: Context contains only one Session. A bulk operation needs to keep a transaction open while it consumes the sequence of entities on which it is to operate, and also to be able to commit work (closing a transaction) whenever it modifies one of those entities. I suppose that one could work around this by draining the sequence into a List and then reloading them one at a time for processing, but how inefficient that is! -- Mark H. Wood Lead Technology Analyst University Library Indiana University - Purdue University Indianapolis 755 W. Michigan Street Indianapolis, IN 46202 317-274-0749 www.ulib.iupui.edu -- All messages to this mailing list should adhere to the Code of Conduct: https://www.lyrasis.org/about/Pages/Code-of-Conduct.aspx --- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to dspace-tech+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dspace-tech/ZBshlJKj9oObgZOi%40IUPUI.Edu.
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