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Imported from: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/d7c5cf6060fa4598#

We've implemented parallel cache rebuild protection in 5.2.0-B1 by setting
lock before creating new cache. This ensured that all other requests were
receiving old cache version or just waiting for a lock to be released.

However I've found a bug in that system too, when multiple visitors, who
encountered a missing/outdated cache would set lock in parallel and start
rebuild process. This of course would be slightly smaller number of
parallel rebuild requests then without protection added in 5.2.0-B1, but
still needs to be fixed.

parallel_cache_rebuild_fix.patchTask:

Related Tasks

Ready for testing.

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http://www.in-portal.com
http://www.alex-time.com

parallel_cache_rebuild_fix.patch