2.7.1

This release is a maintenance release in the 2.7.x series. It primarily improves server monitoring and server selection diagnostics, as well as the convenient transaction API.

The following notable tickets have been closed:

• RUBY-1714 Check client & monitoring threads on server selection failures
• RUBY-1541 Server selection should fail immediately if the cluster has no servers
• RUBY-1715 Log ismaster retries on monitoring connections
• RUBY-1719 Unknown servers are not marked as such in summaries
• RUBY-1578 Driver attempts to read session attributes during response handling even if it determines sessions are not supported
• RUBY-1665 count_documents helper does not start transactions
• RUBY-1654 Implement w:majority when retrying commitTransaction
• RUBY-1693 Add timeout for with_transaction