@Anastasia Seeing this issue in 2.1-beta4-xenial-amd64. I've reported this in #1592179 for 2.0.0-xenial-amd64, not sure what the proper venue is.

I've attached a dump of /var/log/juju/machine-0.log from the controller immediately after bootstrap against the local LXD cloud. The ERROR messages are:

2017-02-01 02:34:16 ERROR juju.worker.dependency engine.go:547 "machiner" manifold worker returned unexpected error: setting machine addresses: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.worker.logger logger.go:47 connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.worker.dependency engine.go:547 "tools-version-checker" manifold worker returned unexpected error: cannot update tools information: connection is shut down
2017-02-01 02:34:16 ERROR juju.worker.dependency engine.go:547 "mgo-txn-resumer" manifold worker returned unexpected error: cannot resume transactions: connection is shut down
2017-02-01 02:34:16 ERROR juju.worker.dependency engine.go:547 "ssh-authkeys-updater" manifold worker returned unexpected error: starting key updater worker: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.api.watcher watcher.go:87 error trying to stop watcher: connection is shut down
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:16 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:17 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:17 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:17 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe
2017-02-01 02:34:21 ERROR juju.rpc server.go:510 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:38130: write: broken pipe