WARNING: DATA RACE
Write by goroutine 421:
  bytes.(*Buffer).Write()
      /usr/lib/go-1.6/src/bytes/buffer.go:133 +0x4b
  fmt.Fprintln()
      /usr/lib/go-1.6/src/fmt/print.go:255 +0xc5
  github.com/juju/loggo.(*simpleWriter).Write()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/writer.go:65 +0x198
  github.com/juju/loggo.(*Context).write()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/context.go:119 +0xf3
  github.com/juju/loggo.(*module).write()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/module.go:60 +0x78
  github.com/juju/loggo.Logger.LogCallf()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/logger.go:109 +0x29c
  github.com/juju/loggo.Logger.Logf()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/logger.go:65 +0x71
  github.com/juju/loggo.Logger.Infof()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/loggo/logger.go:129 +0x68
  github.com/juju/juju/api.connectWebsocket()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/api/apiclient.go:297 +0x792
  github.com/juju/juju/api.open()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/api/apiclient.go:171 +0x144
  github.com/juju/juju/api.Open()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/api/apiclient.go:156 +0xa5
  github.com/juju/juju/cmd/modelcmd.(*JujuCommandBase).apiOpen()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/base.go:247 +0x197
  github.com/juju/juju/cmd/modelcmd.(*JujuCommandBase).(github.com/juju/juju/cmd/modelcmd.apiOpen)-fm()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/base.go:161 +0x9a
  github.com/juju/juju/cmd/modelcmd.newAPIConnectionParams.func1()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/base.go:302 +0xc9
  github.com/juju/juju/juju.NewAPIConnection()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/juju/api.go:75 +0x316
  github.com/juju/juju/cmd/modelcmd.(*JujuCommandBase).NewAPIRoot()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/base.go:114 +0x3f8
  github.com/juju/juju/cmd/modelcmd.(*JujuCommandBase).NewAPIRoot-fm()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/controller.go:155 +0x9b
  github.com/juju/juju/cmd/modelcmd.OpenFunc.Open()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/apiopener.go:27 +0x9f
  github.com/juju/juju/cmd/modelcmd.(*ControllerCommandBase).NewAPIRoot()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/controller.go:157 +0x3b6
  github.com/juju/juju/cmd/juju/controller.(*destroyCommandBase).getControllerAPI()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/juju/controller/destroy.go:312 +0xdc
  github.com/juju/juju/cmd/juju/controller.(*destroyCommand).Run()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/juju/controller/destroy.go:125 +0x2d4
  github.com/juju/juju/cmd/modelcmd.(*sysCommandWrapper).Run()
      <autogenerated>:109 +0x84
  github.com/juju/juju/cmd/modelcmd.(*baseCommandWrapper).Run()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/cmd/modelcmd/base.go:266 +0x10b
  github.com/juju/cmd.(*SuperCommand).Run()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/cmd/supercommand.go:456 +0x8b4
  github.com/juju/juju/featuretests.(*cmdControllerSuite).run()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/featuretests/cmd_juju_controller_test.go:42 +0x137
  github.com/juju/juju/featuretests.(*cmdControllerSuite).TestControllerDestroy()
      /home/ubuntu/juju-core_2.0-beta14/src/github.com/juju/juju/featuretests/cmd_juju_controller_test.go:217 +0x3a9