DRIVERS-3218 : Summary of necessary driver changes Drivers should update their CMAP & SDAM error handling implementations to NOT clear the pool if connection establishment fails in certain circumstances.  Additionally, drivers now new error labels to establishment errors. Commits for syncing spec/prose tests (and/or refer to an existing language POC if needed) https://github.com/mongodb/specifications/commit/1cafc53b729df3f1ecb144dba78d51da6ffa6a55 (follow-up test fix) https://github.com/mongodb/specifications/commit/c12c50ed0ff3df870883e2c1d51254e933f9850e Context for other referenced/linked tickets { }