AWS DMS Source MongoDB and Target RDS Postgres Full load not happening but ongoing replication happens

Question

I created a DMS task: Source - MongoDB Target - RDS Postgres

I have successfully working pipelines with full load + Ongoing replication working.

But for some collections in my source mongo when I create Full load or Full load + Ongoing replication, Task shows successfully completed and starts ongoing replication. But Full load doesn't happens only schema gets created in postgres with 0 rows, and Ongoing replication starts. CloudWatch shows no error even after detailed debug.

Answer 1

In our case it's because of wrong database name configuration in DMS mongoDB endpoint. The table creation and CDC still work, but full load fails.