I tried to import formatted json file into mongodb. but always it says that can't insert
{
  "marks": [
    {
      "class": {
        "className": "A"
      },
      "subject": "maths",
      "score": 43,
      "grade": "a"
    },
    {
      "class": {
        "className": "B"
      },
      "subject": "maths",
      "score": 34,
      "grade": "c"
    }
  ]
}
what is the reason for this. I used command mongoimport --db sss --collection bbv --file a.json and the error message is 
exception:BSON representation of supplied JSON is too large: code FailedToParse: FailedToParse: Expecting '{': offset:0
				
                        

try using
as the import command instead.
@see: Mongodb Mongoimport too large: Failure parsing errors