When setting up an index build, we take a collection MODE_X lock. This can lead to a deadlock if there is also a replication state transition along with a prepared transaction. The index builder holds the RSTL in MODE_IX with the state transition waiting to take the RSTL in MODE_X. The index builder can't acquire the collection lock however because a prepared transaction is holding the collection lock in MODE_IX. In particular this is an issue because the index builder is purposely not interrupted for the state transition. See SERVER-44722 describing a similar issue. We should be able to fix this by unlocking the RSTL and retrying with a timeout like we do during index build commit.
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SERVER-71198 Assert that unkillable operations that take X collection locks do not hold the RSTL
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- Backlog
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- Closed
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SERVER-42621 3 way deadlock can happen between hybrid index build, prepared transactions and stepdown thread.
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- Closed
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- Closed
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