[SERVER-44939] Allow data replication across config versions Created: 04/Dec/19 Updated: 29/Oct/23 Resolved: 30/Jan/20 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Replication |
| Affects Version/s: | None |
| Fix Version/s: | 4.3.4 |
| Type: | Task | Priority: | Major - P3 |
| Reporter: | Siyuan Zhou | Assignee: | Pavithra Vetriselvan |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Backwards Compatibility: | Fully Compatible | ||||||||||||||||||||
| Backport Requested: |
v4.2
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| Sprint: | Repl 2020-01-27, Repl 2020-02-10 | ||||||||||||||||||||
| Participants: | |||||||||||||||||||||
| Case: | (copied to CRM) | ||||||||||||||||||||
| Description |
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Safe Reconfig requires data replication across config versions for liveness reasons. Currently, we do not sync from a node that has a different config version. The oplog fetcher checks if it should stop fetching from the sync source (after it has fetched the first batch). shouldStopFetching calls replCoord->shouldChangeSyncSource which finally calls topCoord->shouldChangeSyncSource. Here, we check for the various reasons we would want to change sync source (i.e. not being in the same config). |
| Comments |
| Comment by Githook User [ 30/Jan/20 ] |
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Author: {'username': 'pvselvan', 'name': 'Pavithra Vetriselvan', 'email': 'pavithra.vetriselvan@mongodb.com'}Message: |