Comment 1 for bug 1576419

The test runs fine up to this point:

PASS: docker_api_containers_test.go:902: DockerSuite.TestContainerApiKill 0.420s
PASS: docker_api_containers_test.go:441: DockerSuite.TestContainerApiPause 0.491s
PASS: docker_api_containers_test.go:800: DockerSuite.TestContainerApiPostCreateNull 0.291s
PASS: docker_api_containers_test.go:887: DockerSuite.TestContainerApiRename 0.421s
PASS: docker_api_containers_test.go:916: DockerSuite.TestContainerApiRestart 1.555s
Connection to 10.42.43.169 closed by remote host.^M
adt-run [17:08:10]: ERROR: testbed failure: testbed auxverb failed with exit code 255

Then it apparently kills the remote sshd end of the ssh session, which makes the controller's ssh process exit with 255 (255 is ssh's code for an interrupted connection ).

I checked five different worker logs and it's always the same place where this happens. So whatever the next test after TestContainerApiRestart is is likely the one that causes this.