RevisionCreatedListeners not asynchronous
Issue #39
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It appears that Grails event processing mechanism performs synchronous processing unless some configuration is performed. It seems that currently our event listeners (such as BiVes) responding to RevisionCreatedEvent operate on the same thread as the submission flow. This results in the submission flow crashing if BiVes has an error, as in the bug report below.
Comments (3)
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reporter
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reporter
An article on how to make grails events processing asynchronous http://adhockery.blogspot.co.uk/2010/05/asynchronous-application-events-in.html
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reporter
Following the prescription from the link above leads to hibernate issues..specifically "org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here".
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The bug renders the system in an inconsistent state. If for any reason any of the listeners crashes, the submission service crashes. This rolls back the transaction in the database, but the files have been updated in the repository, meaning we have more revisions of the model in the repository than in the database.