The issue is caused by hand-crafted protobuf message. The runtime.errorBody
defines two protobuf fields with same number. We need to upgrade the
version to fix it. Otherwise, the client side won't receive any errors
from server side because of panic.
```
mismatching field: runtime.errorBody.error, want runtime.errorBody.message
```
It can fix the cases
PASSES="build grpcproxy" CPU=4 RACE=true ./test -run TestV3CurlLeaseRevokeNoTLS
The original error is like:
```
v3_curl_lease_test.go:109: testV3CurlLeaseRevoke: prefix (/v3) endpoint (/kv/lease/revoke): error (read /dev/ptmx: input/output error (expected "etcdserver: requested lease not found", got ["curl: (52) Empty reply from server\r\n"])), wanted etcdserver: requested lease not found
v3_curl_lease_test.go:109: testV3CurlLeaseRevoke: prefix (/v3beta) endpoint (/kv/lease/revoke): error (read /dev/ptmx: input/output error (expected "etcdserver: requested lease not found", got ["curl: (52) Empty reply from server\r\n"])), wanted etcdserver: requested lease not found
```
The `Empty reply from server` is caused by panic and server recover it
but it doesn't have chance to reply to client.
Signed-off-by: Wei Fu <fuweid89@gmail.com>
This commit adds a feature for creating a user without password. The
purpose of the feature is reducing attack surface by configuring bad
passwords (CN based auth will be allowed for the user).
The feature can be used with `--no-password` of `etcdctl user add`
command.
Fix https://github.com/coreos/etcd/issues/9590
