Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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Impala 2.10.0
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None
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None
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ghx-label-9
Description
The coordinator may receive multiple backend status reports concurrently for a few reasons:
- The backend believes that sending the report failed and retries when in fact the first report did reach the coordinator.
- A report is sent by the reporting thread at the same time that one is sent by Finalize().
- Multiple fragments from the same backend send reports at the same time.
This has the possibility of causing races. One such race was fixed in IMPALA-5749, but we should deal with the underlying issue of concurrent reports in a more complete way, rather than just trying to fix individual races as they become apparent.