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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: 8.2.0-rc0
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Component/s: None
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Storage Execution
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ALL
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Storage Execution 2025-06-23
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In SERVER-101952 we added a new timeseries/create_indexes.js FSM test that preform insert operations on a collection while the collection is being repeatedly dropped and recreated as both timeseries and normal collection.
When this test runs on viewless timeseries suite that have the `createViewlessTimeseriesCollections` feature flag enabled, we observed that the collection can end-up with mixed documents format. The collection will contain both bucket documents and normal documents.
example
[
{
"_id": {
"$oid": "681e33dcaf015752e8f31a2c"
},
"control": {
"version": 2,
"min": {
"_id": {
"$oid": "681e33dff858542ab53dbf6a"
},
"measurement": "measurement",
"time": {
"$date": "2025-05-09T16:57:00Z"
}
},
"max": {
"_id": {
"$oid": "681e33dff858542ab53dbf70"
},
"measurement": "measurement",
"time": {
"$date": "2025-05-09T16:57:03.732Z"
}
},
"count": 3
},
"data": {
"time": {
"$binary": {
"base64": "CQClofq1lgEAAIBNAgAAWAEAAAA=",
"subType": "07"
}
},
"_id": {
"$binary": {
"base64": "BwBoHjPf+FhUKrU9v2qATQAAABAAAAAA",
"subType": "07"
}
},
"measurement": {
"$binary": {
"base64": "AgAMAAAAbWVhc3VyZW1lbnQAgA0AAAAAAAAAAA==",
"subType": "07"
}
}
}
},
{
"_id": {
"$oid": "681e33dff858542ab53dbf64"
},
"measurement": "measurement",
"time": {
"$date": "2025-05-09T16:57:03.571Z"
}
},
{
"_id": {
"$oid": "681e33dff858542ab53dbf66"
},
"measurement": "measurement",
"time": {
"$date": "2025-05-09T16:57:03.574Z"
}
}
]
My suspect is that the write path does not properly handle concurrent transformation to the underlying collection from timeseries to normal collection or vice versa.
How to reproduce
- Run jstests/concurrency/fsm_workloads/timeseries/timeseries_create_indexes.js test in the concurrency_replication_viewless_timeseries suite.
- The test will eventually hit this tassert
- is related to
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SERVER-101952 createIndexes and listIndexes support for viewless timeseries
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- Closed
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- related to
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- Closed
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