mongodb - "Failed to instantiate java.util.List using constructor NO_CONSTRUCTOR with arguments ",

Question

"Failed to instantiate java.util.List using constructor NO_CONSTRUCTOR with arguments ",

while fetching data from mongo .. what could be possible reason for this

Answer 1

I was having the same issue, It was the aggregation when unwind happened,Dont create the List of Object in Data object,

My previous class

Account{
        String _id;
          List<Transaction> trasactionList
       }

Corrected class

Account{
          String _id;
          Transaction trasactionList
    }