"Bad Handshakee" error when connecting

[denisahearn]

I am trying to use this library from Ruby via Kodama (https://github.com/y310/kodama) and ruby-binlog (https://bitbucket.org/winebarrel/ruby-binlog).

When I run the example code at https://github.com/y310/kodama#simple-client, I get the following error:

D, [2017-06-06T07:37:42.648412 #99723] DEBUG -- : MySQL server has gone away (Binlog::Error)
ruby-2.4.1@cloudvault/gems/kodama-0.1.1/lib/kodama/client.rb:117:in `wait_for_next_event'
ruby-2.4.1@cloudvault/gems/kodama-0.1.1/lib/kodama/client.rb:117:in `start'
ruby-2.4.1@cloudvault/gems/kodama-0.1.1/lib/kodama/client.rb:20:in `start'
./lib/mysql-listener.rb:3:in `<main>'
Bad handshakee

I am running MySQL version 5.6.25 on Mac OS Sierra

My host, user, password and port are all specified correctly, and my MySQL user has the database privileges (SUPER, REPLICATION SLAVE, EVENT) that ruby-binlog says are required. MySQL server is currently running on my Mac.

Is this library expected to work with MySQL 5.6? If yes, then what could cause the "Bad handshakee" error that I am encountering?

Thanks,
Denis