Anyone experienced a problem when passing an array of objects created with lodash's _.merge from the getInputData to the map stage in a Map Reduce and getting SSS_USAGE_LIMIT_EXCEEDED even tho the operations in the map stage are simple? only loading a record and setting a few values?

How many records?

_.merge

just returns an Object, so I'd not expect it to behave any differently; what makes you suspect it's

_.merge

and not just the number of operations?

Only two searches merged in getInputData, the map phase is only loading a record and setting some values(also perform another small search) since each value reaching map have its own instance of the map phase I don’t see how map would reach usage limit.

You'll have to share code and sample data I imagine