Todd Lipcon created KUDU-1380:
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Summary: Scanners rewind to beginning of the tablet on
SERVER_TOO_BUSY
Key: KUDU-1380
URL: https://issues.apache.org/jira/browse/KUDU-1380
Project: Kudu
Issue Type: Bug
Affects Versions: 0.7.1
Reporter: Todd Lipcon
Priority: Blocker
When a scanner receives ERROR_SERVER_TOO_BUSY from an overloaded TS, the
CanBeRetried() function indicates that it is safe to retry. However, this ends
up calling through to ReopenCurrentTablet() which rewinds back to the start of
the tablet in the case that the scan wasn't marked as fault-tolerant.
In the case of a lot of concurrent TPCH Q6 queries via Impala, this ended up
resulting in "never-ending" queries - each scanner was likely to hit the
occasional TOO_BUSY error and start back at the beginning.
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