Hi,

I'm using change streams to gather statistics about my operations (need to take some info from each insert/update) - so I need it to act as a listener without closing.

I inserted 1,000,000 documents into a collection and on the change stream side I am using the start_at_operation_time() option to gather all the required info.

I noticed that the change stream closes randomly before all 1M objects are viewed (using a counter in the loop).

Also, I noticed that when I configure the max_await_time() to 5000 ms then it works fine and all documents are captured before it closes.

The behavior I need is to have the change-stream as a listener that waits for changes all the time. 

Is there a way to have this loop blocking? meaning that it will always wait for the next incoming change without exiting the loop.

I saw that someone once issued a "bug" about it, but this is the behavior I want to implement:

https://jira.mongodb.org/browse/CXX-2278?jql=project%20%3D%20CXX%20AND%20component%20%3D%20Implementation

From some POCs that I made with Golang and python driver, it looks like they are always blocking and waiting for the next change.

mongocxx driver version: 3.6.6

mongoc driver version: 1.20.1