Hi @Prasad_Saya ,
I am having similar kind of issue. My operation is based on the last generated call on mongodb. I am generating a key in incremental order and for that I need to fetch the last generated key and then I am incrementing it based on last generated. Issue I am getting is when i hit the api in 0 sec for 50 keys the keys are not uniquely generated it points to the same thread. So is there any lock mechanism in mongodb to generate only one key at a time? Please suggest