[jira] [Created] (KYLIN-1397) Query result cached even when underly HTABLE scan failed

["Su Ralph (JIRA)" <ji...@apache.org>]

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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