version: 3.4.1

According to the core dump and stack when an exception occurs, locate the endless loop at pool.js, and there is no addition logs or other messages I can found. And also no idea why it will triggered, but it will appears several times a day.

https://github.com/mongodb/node-mongodb-native/blob/v3.4.1/lib/core/connection/pool.js#L1068

https://github.com/mongodb/node-mongodb-native/blob/v3.4.1/lib/core/connection/pool.js#L1164