General

• This release is focused on bug fixes since 1.3.1.

New features and improvements

• Added tokumxstat.py, a script for polling db.engineStatus(). (#534, #535)
• Improved the error messages reported in the server log when filesystem errors occur. (#703, #715)
• Improved the concurrency of sequential inserts into a unique index. (#705)
• Improved the concurrency of justOne remove operations. (#721)

Bug fixes

• Removed an overactive assert that could prevent a server from starting if recovery was needed. (#650)
• Fixed counting of oplog insert statistics on secondaries. Previously, operations were double-counted on secondaries. (#689)
• Fixed the upgrade of system.users collections to work when the server is started with --auth. (#690)
• Changed required authorization of transaction and loader commands so that they are available to normal users when running with --auth. (#698)
• Fixed the semantics of getLastError with j:1 or fsync:1. (#709)
• Fixed the rollback of very large transactions after a replication failover. (#716, #720)
• Fixed a problem when dropping an index concurrently with a background index build. The server now correctly serializes those operations. (#745)