Details
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Task
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Resolution: Fixed
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Major - P3
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None
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None
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Fully Compatible
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Repl 2020-01-13
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50
Description
If a node was primary in 4.3 but restarted with a 4.2 binary after an unclean shutdown. The fastcount of oplogTruncateAfterPoint could be wrong. This is related to SERVER-41391 where we added a function to correct the fastcount. But since 4.2 doesnt have that ability (unless we backport that), restarting a node with a 4.2 binary after an unclean shutdown in 4.3, the fastcount could be wrong.
We do not even support a crashed v4.3 binary being restarted with a v4.2 binary. So putting the requires_fcv_44 tag to the test.