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
Description
Description
Description:
No documentation summary in engineering ticket
Engineering Ticket Description:
Currently, there is a 3 way deadlock. Assume that we are transitioning from secondary to rollback.
- Thread A (Read thread) acquires RSTL lock in IX and blocked by a prepared txn due to prepare conflict.
- Rollback enqueues RSTL lock in X mode. And blocked behind A.
- Prepared txn won’t be able commit until we transition out of rollback.
Alternatively, thread A might have got blocked on prepared transaction due to conflicting DB/ collection lock. For eg. dbhash cmd.EDIT: Blocked due to conflicting mongoDB locks is not possible as secondary prepared txn yield mongoDB locks.
Scope of changes
Impact to Other Docs
MVP (Work and Date)
Resources (Scope or Design Docs, Invision, etc.)
Attachments
Issue Links
- documents
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SERVER-41035 Rollback should kill all user operations before taking RSTL lock in X.
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- Closed
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- is related to
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DOCS-12717 Docs for SERVER-37574: Force reconfig should kill user operations
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- Closed
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