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Type:
Bug
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Resolution: Fixed
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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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None
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Catalog and Routing
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Fully Compatible
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ALL
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CAR Team 2026-02-16
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200
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🟩 Routing and Topology
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None
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None
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None
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None
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None
Currently, if a timeseries collection is upgraded during the execution of an inner aggregation pipeline it could happen the following:
- collection is legacy (viewful)
- aggregation find the view and translate the namespace to target the underlying system buckets collection
- the timeseries collection gets upgraded to viewless
- the aggregation start executing and find that the timeseries system buckets collection does not exist anymore.
Currently, in this situation we would simply return empty results (BF-41554) instead we should throw an error to retry the aggregation.
- is caused by
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SERVER-117388 Create sharding stepdown passthrough suite with fcv upgrade/downgrade
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- Closed
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- is related to
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SERVER-119035 Aggregate on view over timeseries collection returns empty results during viewless timeseries upgrade
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- Closed
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- related to
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SERVER-120235 Add test coverage for graphLookup on timeseries collections during FCV upgrade/downgrade
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- Backlog
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