machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-6", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-1", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-3", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-17", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-7", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:439 failed to lookup "machine-28", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:460 failed to lookup "unit-sentry-0", skipping port change
machine-0: 2016-05-31 13:36:36 ERROR juju.worker.firewaller firewaller.go:460 failed to lookup "unit-sentry-0", skipping port change
machine-0: 2016-05-31 13:36:37 ERROR juju.worker.firewaller firewaller.go:460 failed to lookup "unit-sentry-0", skipping port chan