Joe McDonnell created IMPALA-12154:
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Summary: LIRS cache implementation is missing some locations to
trim the recency list
Key: IMPALA-12154
URL: https://issues.apache.org/jira/browse/IMPALA-12154
Project: IMPALA
Issue Type: Bug
Components: Backend
Affects Versions: Impala 4.3.0
Reporter: Joe McDonnell
Assignee: Joe McDonnell
In some testing for IMPALA-10971, I found that some code locations doing
ToUninitialized() are not checking and trimming the recency list. In
particular, Erase() doesn't check whether the entry being erased is the last
entry on the recency list, so it doesn't do the trim appropriately. Also, the
instant eviction codepath doesn't check either.
These are edge cases, but they can result in an assert firing for
EnforceProtectedCapacity() or MoveToRecencyListBack().
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