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. Note the clarification in these PRs: https://github.com/mongodb/specifications/pull/1879 https://github.com/mongodb/specifications/pull/1892 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 { }