We recently saw the following failure:
2021-11-17 13:50:59+0000 [QueryProtocol,client] b'ubuntu-kernel-ancillary-bot' failed auth b'publickey'
2021-11-17 13:50:59+0000 [QueryProtocol,client] Traceback (most recent call last):
--- <exception caught here> ---
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/lazr/sshserver/auth.py", line 237, in _ebLogToBanner
reason.trap(UserDisplayedUnauthorizedLogin)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 460, in trap
self.raiseException()
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 488, in raiseException
raise self.value.with_traceback(self.tb)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/conch/ssh/userauth.py", line 218, in _ebMaybeBadAuth
reason.trap(error.NotEnoughAuthentication)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 460, in trap
self.raiseException()
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 488, in raiseException
raise self.value.with_traceback(self.tb)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/lazr/sshserver/auth.py", line 349, in _reportNoSuchUser
failure.trap(xmlrpc.Fault)
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 460, in trap
self.raiseException()
File "/srv/launchpad.net/production/txpkgupload-rev-7c86127c3ed6acd4e05faeed3b787bb9e9ac0180/env/lib/python3.5/site-packages/twisted/python/failure.py", line 488, in raiseException
raise self.value.with_traceback(self.tb)
twisted.internet.error.ConnectionDone: Connection was closed cleanly.
There's no obvious reason for this logged, but it's plausible that some kind of glitch caused a single authserver request from txpkgupload to fail. lazr.sshserver should have a short retry loop for this sort of thing rather than failing immediately.
