Compatibility Changes in MongoDB 5.2
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MongoDB 5.2 is a rapid release and is only supported for MongoDB Atlas. MongoDB 5.2 is not supported for use on-premises. For more information, see MongoDB Versioning.
The following 5.2 changes can affect compatibility with older versions of MongoDB.
$setWindowFields Stage with Transactions and Snapshot Read Concern
In MongoDB versions earlier than 5.3, the $setWindowFields aggregation pipeline stage cannot be used with transactions or the "snapshot" read concern.
Removed Parameters
Removed mongod Options
MongodB removes the following mongod options:
Removed mongod Options | Description |
|---|---|
--cpu | MongoDB 5.2 removes the --cpu mongod option. |
Existing Indexes Can Be Dropped During an Index Build
Starting in MongoDB 5.2, you can use dropIndexes or db.collection.dropIndexes() to drop existing indexes on the same collection even if there is an index build in progress. In earlier versions, attempting to drop a different index during an in-progress index build results in a BackgroundOperationInProgressForNamespace error.