[SERVER-54610] Resharding writes to donor documents should take exclusive locks Created: 18/Feb/21 Updated: 29/Oct/23 Resolved: 14/Jun/21 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Sharding |
| Affects Version/s: | None |
| Fix Version/s: | 5.0.0-rc2, 5.1.0-rc0 |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Daniel Gottlieb (Inactive) | Assignee: | Haley Connelly |
| 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 | ||||||||||||||||||||
| Operating System: | ALL | ||||||||||||||||||||
| Backport Requested: |
v5.0
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| Sprint: | Sharding 2021-06-14, Sharding 2021-06-28 | ||||||||||||||||||||
| Participants: | |||||||||||||||||||||
| Story Points: | 1 | ||||||||||||||||||||
| Description |
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Resharding's management of the oldest timestamp pin scans over all of the documents in the donor collection (one document per concurrent resharding operation), but only writes to a single document. In a future world where there can be multiple resharding operations happening, this can result in write-skew that can manifest as "leaking" history until a restart, rollback or new resharding operation. This ticket should also uncomment the locking invariant. |
| Comments |
| Comment by Vivian Ge (Inactive) [ 06/Oct/21 ] |
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Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it’s been triggered. For more active release information, please keep an eye on #server-release. Thank you! |
| Comment by Githook User [ 16/Jun/21 ] |
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Author: {'name': 'Haley Connelly', 'email': 'haley.connelly@mongodb.com', 'username': 'haleyConnelly'}Message: |
| Comment by Githook User [ 15/Jun/21 ] |
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Author: {'name': 'Haley Connelly', 'email': 'haley.connelly@mongodb.com', 'username': 'haleyConnelly'}Message: (cherry picked from commit 9cf1509ad2664830d37a7a128d43752dcac8556a) |
| Comment by Githook User [ 14/Jun/21 ] |
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Author: {'name': 'Haley Connelly', 'email': 'haley.connelly@mongodb.com', 'username': 'haleyConnelly'}Message: |