MongoDB 4.2.3-rc1 is released

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Kelsey Schubert

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Jan 18, 2020, 1:21:57 AM1/18/20
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MongoDB 4.2.3-rc1 is out and is ready for testing. This is a release candidate containing only fixes since 4.2.2. The next stable release 4.2.3 will be a recommended upgrade for all 4.2 users.

Fixed in this release:
  • SERVER-42565 Aggregations and find commands sort missing fields differently
  • SERVER-44598 Shards do not treat the IGNORED version as "intended sharded"
  • SERVER-44828 Correct logic to re-compute dependencies after absorbing a $sort into query layer
  • SERVER-44869 Add query knob to control memory limit for $push and $addToSet
  • SERVER-44964 Calculate index build memory usage per key based on BSONObj buffer capacity, not size
  • SERVER-44991 Performance regression in indexes with keys with common prefixes
  • SERVER-45270 Increased vulnerability to slow DNS
  • SERVER-45309 Ensure bind credentials live longer than LDAP operations
  • SERVER-45396 fix the "me" field in isMaster responses when using splithorizon
  • TOOLS-1952 Use --forceTableScan by default when running against WiredTiger nodes
  • TOOLS-2453 Index keys not escaped correctly
  • WT-5120 Checkpoint hangs when reconciliation doesn't release the eviction generation
4.2 Release Notes | All Issues | Downloads

As always, please let us know of any issues.

-- The MongoDB Team
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