Github user afs commented on the pull request:
https://github.com/apache/jena/pull/109#issuecomment-164471467
I would not be confident yet that all the machinery in Mantis is right - it
has not been used enough to know and may be too complicated. One test is to
use it with transactions involving Lucene (weak transactions) and TDB2. But
components was one thing I had trouble with until introducing the difference
between a component and the overall transaction.
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