Su Ralph created KYLIN-1397:
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Summary: Query result cached even when underly HTABLE scan failed
Key: KYLIN-1397
URL: https://issues.apache.org/jira/browse/KYLIN-1397
Project: Kylin
Issue Type: Bug
Components: Query Engine
Affects Versions: v2.0
Reporter: Su Ralph
Assignee: Edward Zhang
Query result cached even when underly HTABLE scan failed. When the HTABLE
fixed, the query would still get the cached result.
In my case, there is an Hbase table(one hung htable in all of 14 htables
involved) issue happened when user issue an query. The query hungs for long
time. Later, when the the htable hung issue fixed. User still get the empty
result.
But if user just simple change a query condition, the result would return
correct result. The empty result fixed when kylin admin "Reload Metadata".
This indicates that kylin query cache are *incorrectly build* and util admin
"Reload Metadata" we don't have an way invalidate the cache.
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