Clebert Suconic created ARTEMIS-5753:
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Summary: Paging has the possibility on losing messages during
failback in older versions (before 2.33)
Key: ARTEMIS-5753
URL: https://issues.apache.org/jira/browse/ARTEMIS-5753
Project: ActiveMQ Artemis
Issue Type: Bug
Affects Versions: 2.33.0
Reporter: Clebert Suconic
Fix For: 2.45.0
We recently changed the paging thread model to be single threaded, so recent
versions are not affected by this.
2.33 and before could get into a race where Pages are marked as complete and
the entire set of files removed, future written pages would then be marked as
complete and these messages wouldn't be delivered.
This happened during failback on the reports I had seen, and on my tests.
I couldn't reproduce this on latest versions, and that's consistent with the
new threading model.
I am adding a UnitTest introducing the exact conditon that would cause the loss
on the latest version and still applying a defense in case it happened, just to
be safe.
I am also applying some extra cleanup on Acks in case the page files are not
present, to prevent any possible loss.
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