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Type:
Improvement
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Sharding
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Labels:
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Sharding EMEA
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Sharding EMEA 2023-01-23
Apparently there are circumstances where the ShardRegistry on config servers sometimes reads non-majority-committed writes to config.shards, based on:
- https://github.com/mongodb/mongo/blob/403ee63/src/mongo/s/client/shard_registry.cpp#L466-L475
- https://github.com/mongodb/mongo/blob/403ee63/src/mongo/db/op_observer_impl.cpp#L1316-L1322
- https://github.com/mongodb/mongo/blob/403ee63/src/mongo/db/repl/rs_rollback.cpp#L1999-L2005
After SERVER-46202 makes the ShardRegistry causally consistent, it should be possible to eliminate any places where configsvrs do non-majority-commited ShardRegistry reads (thereby getting rid of ShardRegistry::clearEntries()).
- duplicates
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SERVER-64717 Shard registry is cleared during rollbacks
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- Closed
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- is related to
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- Closed
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- related to
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SERVER-46202 Implement ShardRegistry on top of ReadThroughCache to make it causally consistent
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- Closed
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