I meet the same issue.

[LemonITCN]

I meet the same issue.

I use the latest version protobuf in https://github.com/protocolbuffers/protobuf/releases

and I go get -u github.com/golang/protobuf/protoc-gen-go

then if I modified to google.golang.org/grpc v1.26.0

protobuf build pb error undefined: grpc.SupportPackageIsVersion6.

if I modified to google.golang.org/grpc v1.27.0

then etcd will report err:

Originally posted by @hesongkang in #11563 (comment)

[LemonITCN]

I use protoc-gen-go v1.3.2 to solve this problem temporarily, please author to upgrade grpc version to 1.27. * As soon as possible, thank you.

[eddycjy]

Awaiting merge, follow #11564.

[VineethReddy02]

Any fix for this?

I get etcd error

# github.com/sercand/kuberesolver
../../pkg/mod/github.com/sercand/kuberesolver@v2.1.0+incompatible/builder.go:108:82: undefined: resolver.BuildOption
../../pkg/mod/github.com/sercand/kuberesolver@v2.1.0+incompatible/builder.go:163:32: undefined: resolver.ResolveNowOption
# go.etcd.io/etcd/clientv3/balancer/picker
../../pkg/mod/go.etcd.io/etcd@v0.0.0-20190709142735-eb7dd97135a5/clientv3/balancer/picker/err.go:32:43: undefined: balancer.PickOptions
../../pkg/mod/go.etcd.io/etcd@v0.0.0-20190709142735-eb7dd97135a5/clientv3/balancer/picker/roundrobin_balanced.go:54:54: undefined: balancer.PickOptions
# go.etcd.io/etcd/clientv3/balancer/resolver/endpoint
../../pkg/mod/go.etcd.io/etcd@v0.0.0-20190709142735-eb7dd97135a5/clientv3/balancer/resolver/endpoint/endpoint.go:112:78: undefined: resolver.BuildOption
../../pkg/mod/go.etcd.io/etcd@v0.0.0-20190709142735-eb7dd97135a5/clientv3/balancer/resolver/endpoint/endpoint.go:180:31: undefined: resolver.ResolveNowOption

If I downgrade grpc I get other errors from grpc.

[r-shreesha]

@eddycjy I see that #11564 got merged recently. However, it's only available in v3.5.0 and later?
(#11637)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed after 21 days if no further activity occurs. Thank you for your contributions.