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Type: Task
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Querying
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Labels:
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Fully Compatible
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Query 2020-08-24
One specific scenario we should test is:
4.6 node runs a retryable write which logs a delta oplog entry 4.6 node downgrades FCV to 4.4 4.6 node downgrades binary to 4.4 Client retries the write performed earlier. This will cause the 4.4 node to fetch the associated oplog entry Check that the write was indeed only performed once
There may be other interesting scenarios we haven't thought of yet.