MongoDB 4.2.21-rc0 is out and is ready for testing. This is a release candidate containing only fixes since 4.2.20. The next stable release 4.2.21 will be a recommended upgrade for all 4.2 users.
Fixed in this release:
- SERVER-62272 Adding schema validation to a collection can prevent chunk migrations of failing documents
- SERVER-66176 [v4.4/v4.2] Minimize work under CollectionCatalog mutex
- SERVER-61097 SizeStorer can cause deadlocks with cache eviction
- SERVER-58506 Command to expose settability for Server Parameters
As always, please let us know of any issues.
-- The MongoDB Team