Details
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Task
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Status: Closed
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Major - P3
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Resolution: Fixed
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None
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None
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Fully Compatible
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Repl 2019-03-25, Repl 2019-04-08
Description
SERVER-33248 allows a node to choose a sync source with the same lastApplied if it has a higher lastOpCommitted. This leads to sync source cycles, as described in SERVER-39367. This is fixed on 4.2 in SERVER-39367, which reverts the change while introducing a new mechanism to propagate the majority commit point through heartbeats. However, SERVER-39367 is not safe to backport to 4.0, since it increases the likelihood of sync source cycles with nodes that have SERVER-33248. On 4.0, we will just revert SERVER-33248.
Attachments
Issue Links
- is related to
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SERVER-39367 lastOpCommitted being reset on restart can cause sync source cycle
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- Closed
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- Closed
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SERVER-33248 Allow choosing a sync source that we are up to date with if it has a higher lastOpCommitted
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- Closed
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