Prasanth Jayachandran created HIVE-10063:
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Summary: LLAP: LowLevelCacheImpl does not match cached ranges
properly
Key: HIVE-10063
URL: https://issues.apache.org/jira/browse/HIVE-10063
Project: Hive
Issue Type: Sub-task
Reporter: Prasanth Jayachandran
Assignee: Sergey Shelukhin
LowLevelCacheImpl uses skip list to map start disk range offset to disk ranges.
Find for match in the skip list uses cache.subMap() to identify correct disk
range. This will not work if the requested disk range offset does not exactly
match the cache disk range offset.
For example: If the cache disk range is 0 - 1000 bytes and if the requested
disk range is 500 - 1000 there will not be cache hit.
We should probably use floorEntry() to get the greatest entry less than or
equal to provided key.
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