$ juju bootstrap -e maas19-home --upload-tools
Bootstrapping environment "maas19-home"
Starting new instance for initial state server
Launching instance
WARNING no architecture was specified, acquiring an arbitrary node
 - /MAAS/api/1.0/nodes/node-0d05c466-ffef-11e5-a124-52540098ca47/
Building tools to upload (1.25.6.1-trusty-amd64)
Installing Juju agent on bootstrap instance
Waiting for address
Attempting to connect to node1.maas19:22
Attempting to connect to node1.maas19:22
Attempting to connect to 10.17.20.201:22
packet_write_wait: Connection to 10.17.20.201 port 22: Broken pipe
ERROR failed to bootstrap environment: subprocess encountered error code 255