Lars Hofhansl created PHOENIX-4148:
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Summary: COUNT(DISTINCT(...)) should have a memory size limit
Key: PHOENIX-4148
URL: https://issues.apache.org/jira/browse/PHOENIX-4148
Project: Phoenix
Issue Type: Bug
Reporter: Lars Hofhansl
I just managed to kill (hang) a region server by issuing a COUNT(DISTINCT(...))
query over a column with very high cardinality (20m in this case).
This is perhaps not a useful thing to do, but Phoenix should nonetheless not
allow to have a server fail because of a query.
[~jamestaylor], I see there GlobalMemoryManager, but I do not quite see how I'd
get a reference to one, once needs a tenant id, etc.
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