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Type:
Improvement
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: 8.0.0, 8.1.0
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Component/s: None
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Cluster Scalability
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ClusterScalability Jun9-Jun23
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None
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3
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TBD
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0
A failed attempt to downgrade a sharded cluster from FCV 8.0 to 7.0 can leave the version in a downgrading state.
In this situation, the moveCollection command fails because the underlying resharding functionality depends on features that are only available starting from FCV 8.0.
The current error message is:
MongoServerError[InvalidOptions]: Resharding improvements is not enabled, reject shardDistribution parameter
However, this error message is difficult to interpret unless you are an engineer familiar with the feature. A clearer and more helpful error message would be:
This command requires FCV 8.0 or higher.
- related to
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SERVER-105088 [v8.0] Improve the error message displayed when FCV downgrade fails due to the presence of tracked collections
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- Needs Merge
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