TestUpdateNodeDemote is flaky #2445
Description
Originally seen on #2433: https://circleci.com/gh/docker/swarmkit/8174?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link
Opening this issue to keep track just in case it shows up again.
2017-11-14 18:24:56.867033 I | http: TLS handshake error from 127.0.0.1:36612: remote error: tls: bad certificate
2017-11-14 18:24:56.898101 I | http: TLS handshake error from 127.0.0.1:41518: remote error: tls: bad certificate
2017-11-14 18:24:56.929495 I | http: TLS handshake error from 127.0.0.1:41521: remote error: tls: bad certificate
--- FAIL: TestUpdateNodeDemote (11.49s)
Error Trace: node_test.go:592
node_test.go:732
Error: Received unexpected error expected node 3 to be unreachable
github.com/docker/swarmkit/testutils.PollFuncWithTimeout
/home/ubuntu/.go_workspace/src/github.com/docker/swarmkit/testutils/poll.go:28: polling failed
Error Trace: node_test.go:605
node_test.go:732
Error: An error is expected but got nil.
Error Trace: node_test.go:606
node_test.go:732
Error: Not equal: 0x9 (expected)
!= 0x0 (actual)
FAIL
coverage: 82.1% of statements
FAIL github.com/docker/swarmkit/manager/controlapi 13.696s
make: *** [coverage] Error 1