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Type:
Improvement
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Resolution: Duplicate
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Replication
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Replication
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5
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It seems when the node persists new config in collection "local.system.replset", it takes "local" database lock in stronger mode (X) and PBWM lock in IS mode. This can lead to 2 major side effects.
1) Since PBWM lock is taken in IS mode, this can block the secondary oplog applier which requires PBWM in X mode. This can result in replication lag. This will be addressed by SERVER-48398
2) Since it takes "local" database lock in X mode, this can block other local database readers and writers.
- Mainly, if this node X is the sync source for node Y, then the oplog fetcher of the node Y can be blocked behind the the reconfig via heartbeat thread due to database lock conflict, leading to replication lag.
- duplicates
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- Closed
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- related to
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SERVER-50519 resumable index build hangs waiting for majority commit point in replica_sets_kill_secondaries_jscore_passthrough
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- Closed
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SERVER-38341 Remove Parallel Batch Writer Mutex
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- Closed
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- Closed
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- Closed
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