[SERVER-45953] Exempt oplog readers from acquiring read tickets Created: 04/Feb/20 Updated: 29/Oct/23 Resolved: 03/Jun/20 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Storage |
| Affects Version/s: | None |
| Fix Version/s: | 4.7.0, 4.4.11, 4.2.18, 4.0.28 |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Eric Milkie | Assignee: | Dianna Hohensee (Inactive) |
| Resolution: | Fixed | Votes: | 1 |
| 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: |
v4.4, v4.2, v4.0
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| Sprint: | Execution Team 2020-05-18, Execution Team 2020-06-01, Execution Team 2020-06-15 | ||||||||||||||||||||||||||||||||
| Participants: | |||||||||||||||||||||||||||||||||
| Case: | (copied to CRM) | ||||||||||||||||||||||||||||||||
| Description |
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There are certain operations on the system that depend on the ability to replicate oplog entries in order to make progress. Today, secondaries reading the oplog on their sync sources can be blocked by read ticket exhaustion, potentially creating deadlocks. In order to break this deadlock situation, we can exempt oplog read queries from needing to acquire read tickets. |
| Comments |
| Comment by Githook User [ 04/Jan/22 ] |
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Author: {'name': 'Dianna Hohensee', 'email': 'dianna.hohensee@mongodb.com', 'username': 'DiannaHohensee'}Message: (cherry picked from commit d1cb83d9199c1a25158d74e47b3aa88b5c33fe8b) |
| Comment by Githook User [ 02/Dec/21 ] |
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Author: {'name': 'Dianna Hohensee', 'email': 'dianna.hohensee@mongodb.com', 'username': 'DiannaHohensee'}Message: (cherry picked from commit d1cb83d9199c1a25158d74e47b3aa88b5c33fe8b) Conflicts: |
| Comment by Githook User [ 13/Nov/21 ] |
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Author: {'name': 'Dianna Hohensee', 'email': 'dianna.hohensee@mongodb.com', 'username': 'DiannaHohensee'}Message: (cherry picked from commit d1cb83d9199c1a25158d74e47b3aa88b5c33fe8b) |
| Comment by Githook User [ 03/Jun/20 ] |
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Author: {'name': 'Dianna Hohensee', 'email': 'dianna.hohensee@mongodb.com', 'username': 'DiannaHohensee'}Message: |