Here's my case:
I upgrade mongo server to 2.6 from 2.4, after that I upgrade user authorization data to 2.6 too.
Then I build c++ legacy-1.0.0 driver on my system which has 2 RHEL6 machine (a 2 nodes replicaset).
I write a c++ function to connect, authenticate, query again a collection.
The function works well when I run it as standalone c++ application. Then I build a shared library and call this function from fcgi application (using dlopen), my fcgi dump at driver's auth api.
I attach the function below.
I can't debug or explain that, just don't know how it happened, please help me.
Thank in advance!