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Type:
Improvement
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Resolution: Unresolved
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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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Catalog and Routing
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Execution Team 2022-12-12, Execution Team 2022-12-26, Execution Team 2023-01-09
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The deadlocks described in SERVER-71191 and SERVER-44722 are caused because the following conditions are true, in general
- An operation is unkillable by stepdown
- While holding the RSTL in IX mode, an operation takes an X collection lock. If there are any prepared transactions, this blocks.
- The stepdown thread tries to acquire the X lock, but blocks because of a conflict
In this situation, the operation that isn't interrupted by stepdown does not make progress. We should add an assertion to our lock helpers that prevent unkillable operations from taking X locks while also holding the RSTL.
- is related to
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SERVER-78662 Deadlock with index build, step down, prepared transaction, and MODE_IS coll lock
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- Closed
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SERVER-73036 Investigate potential deadlock with index builds
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- Closed
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- Closed
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- Closed
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- related to
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- Closed
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- Closed
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- Open
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