In MMAPv1, a DuplicateKeyValue error (error code 84) is a "safe" error, which indicates that a duplicate key has been encountered during a background index build. As mentioned in SERVER-21254, this is harmless and should not leave the MMAPv1-specific code in the storage engine layer.
This ticket is a temporary fix until SERVER-21254 is resolved.
- is related to
-
SERVER-21254 Get rid of the DuplicateKeyValue error code
- Closed