Rabbitmq listener throws error while running worker.run

irb(main):001:0> Listener.initialize /Users/avint8/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/serverengine-2.0.7/lib/serverengine/daemon.rb:163:in reopen': /dev/ttys004 can't change access mode from "r+" to "wb" (ArgumentError) from /Users/avint8/.rbenv/versions/2.3.4/lib/ruby/gems/2.3.0/gems/serverengine-2.0.7/lib/serverengine/daemon.rb:163:in block (2 levels) in daemonize_with_double_fork'

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