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https://github.com/etcd-io/etcd.git
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70b5ef1d3a
The root reason of flakes, was that server was considered as ready to
early.
In particular:
```
../../bin/etcd-2456648: {"level":"info","ts":"2021-01-11T09:56:44.474+0100","caller":"rafthttp/stream.go:274","msg":"established TCP streaming connection with remote peer","stream-writer-type":"stream Message","local-member-id":"ed5f620d34a8e61b","remote-peer-id":"ca50e9357181d758"}
../../bin/etcd-2456648: {"level":"warn","ts":"2021-01-11T09:56:49.040+0100","caller":"etcdserver/server.go:1942","msg":"failed to publish local member to cluster through raft","local-member-id":"ed5f620d34a8e61b","local-member-attributes":"{Name:infra2 ClientURLs:[http://localhost:20030]}","request-path":"/0/members/ed5f620d34a8e61b/attributes","publish-timeout":"7s","error":"etcdserver: request timed out, possibly due to connection lost"}
../../bin/etcd-2456648: {"level":"info","ts":"2021-01-11T09:56:49.049+0100","caller":"etcdserver/server.go:1921","msg":"published local member to cluster through raft","local-member-id":"ed5f620d34a8e61b","local-member-attributes":"{Name:infra2 ClientURLs:[http://localhost:20030]}","request-path":"/0/members/ed5f620d34a8e61b/attributes","cluster-id":"34f27e83b3bc2ff","publish-timeout":"7s"}
```
was taking 5s. If this was happening concurrently with etcdctl, the
etcdctl could timeout.
The fix, requires servers to report 'ready to serve client requests' to consider them up.
Fixed also some whitelisted 'goroutines'.