JRuby times out on successful connection

Under JRuby any thrift socket that doesn't connect immediately will result in a connection timeout.

Under MRI IO.select returns an array of IO objects.
Under JRuby IO.select returns nil, even when an object is ready.

Connections to a cassandra instance on localhost will usually be successful, as socket.connect_nonblock actually connects synchronously.

The following code fails with no pause under JRuby (but works under MRI) when connecting to a remote cassandra cluster:

Thrift::Socket.new(remote_server, 9160, 10).open