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Posted to dev@phoenix.apache.org by "James Taylor (JIRA)" <ji...@apache.org> on 2017/07/06 04:51:00 UTC

[jira] [Created] (PHOENIX-3995) Use medium priority for UPSERT SELECT distributed across cluster

James Taylor created PHOENIX-3995:
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             Summary: Use medium priority for UPSERT SELECT distributed across cluster
                 Key: PHOENIX-3995
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3995
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor
            Assignee: Samarth Jain


An UPSERT SELECT that is running on the server-side should use a medium priority (lower than index priority but higher than normal priority) to prevent deadlocks. If we use the index priority, then there's a danger of deadlocks occurring if the table being upserted into also as indexes (as the index updates would be processed at the index priority).



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