MongoDB 4.2.12 is out and is ready for production deployment. This release contains only fixes since 4.2.11, and is a recommended upgrade for all 4.2 users.
Fixed in this release:
- SERVER-40361 Reduce memory footprint of plan cache entries
- SERVER-47863 Initial Sync Progress Metrics
- SERVER-48471 Hashed indexes may be incorrectly marked multikey and be ineligible as a shard key
- SERVER-50769 server restarted after expr{"expr":"_currentApplyOps.getArrayLength() > 0","file":"src/mongo/db/pipeline/document_source_change_stream_transform.cpp","line":535}}
- SERVER-52654 new signing keys not generated by the monitoring-keys-for-HMAC thread
- SERVER-52879 Periodic operation latency spikes every 5 minutes due to closing idle cached WT sessions
As always, please let us know of any issues.
-- The MongoDB Team