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Type:
Task
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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Labels:
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Fully Compatible
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v4.4
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Repl 2020-03-09, Repl 2020-03-23
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23
In principle we should only need the Global IS/IX lock to read/write the oplog. However, see SERVER-44906, we're inconsistent. Furthermore, there are cases our code requires a DB and Collection lock in order to get a Collection pointer to the oplog, although this is not fundamentally necessary.
Inconsistent locking invites mistakes: deadlocks, race conditions, and unnecessary waiting.
- causes
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SERVER-47959 Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection
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- Closed
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- depends on
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SERVER-44906 Rollback should take global write lock while truncating oplog
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- Backlog
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- is related to
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- Closed
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- links to