Getting error undefined: grpc.SupportPackageIsVersion6 and undefined: grpc.ClientConnInterface

[belwalkar]

Please see the FAQ in our main README.md before submitting your issue.
I could compile till yesterday and suddenly today started getting this error
libprotoc 3.2.0
github.com/grpc-ecosystem/grpc-gateway v1.12.1

[dfawley]

You will need to use a newer version of grpc or an older version of protoc-gen-go (to produce your .pb.go files). If you are using modules, you should have a go.mod in the module with the .pb.go files with a line that requires grpc-go @v1.27.0.

[belwalkar]

root@ip-10-5-1-6:~/cord/device-management# cat go.mod
module github.com/opencord/device-management

go 1.12

require (
github.com/Shopify/sarama v1.26.0
github.com/golang/protobuf v1.3.2
github.com/grpc-ecosystem/grpc-gateway v1.12.1 // indirect
github.com/klauspost/cpuid v1.2.1 // indirect
github.com/sirupsen/logrus v1.4.2
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 // indirect
golang.org/x/net v0.0.0-20191119073136-fc4aabc6c914
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135 // indirect
google.golang.org/grpc v1.26.0
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc // indirect
)

I dont have grpc-go

[belwalkar]

why this issue is closed.

[belwalkar]

ENV PROTOC_VERSION="3.7.0"
github.com/grpc-ecosystem/grpc-gateway v1.12.2 // indrect
google.golang.org/grpc v1.27.0

combination fixed issue

[dfawley]

google.golang.org/grpc v1.27.0

This line will make sure that such an error is impossible.

[belwalkar]

Does that mean protoc version and grpc-gateway version dosent matter

[dfawley]

In this case, that's correct. The latest version of grpc-go will support all versions of the generated code.

Your other option would have been to downgrade the protoc-gen-go (from github.com/golang/protobuf) version to the previous release (1.3.2) before generating the .pb.go files. I see your go.mod says protobuf is 1.3.2, but you must have compiled the protoc-gen-go binary with 1.3.3 (or master@HEAD). Note that the protoc version itself is also irrelevant.

[alan-ma-umg]

I just updated my go.mod with go get -u google.golang.org/grpc. Saw the version changed from 1.26.0 to 1.27.0. Then all my proto gen code stopped complaining undefined grpc.SupportPackageIsVersion6.

[timothyleung1]

I am having problem with undefined grpc.ClientConnInterface as well.

Have v1.27 in my WORKSPACE file ..

Use --sandbox_debug to see verbose messages from the sandbox
compilepkg: error running subcommand: exit status 2
/private/var/tmp/_bazel_tim/8d52925ad011cfdb3758a825d7ae7a61/sandbox/darwin-sandbox/448/execroot/__main__/external/org_golang_google_api/internal/conn_pool.go:29:2: undefined: grpc.ClientConnInterface

[nicolai86]

fwiw, my go.mod contains
require github.com/golang/protobuf v1.3.2 as well as require github.com/golang/protobuf v1.3.4
and I still get this error with bazel and rules_go v0.22.1. Downgrading rules_go to v0.21.3 fixes the issue, but it also means I'm stuck on go < 1.14.

[Eson-Jia]

for google.golang.org/grpc v1.26.0,I usego get github.com/golang/protobuf/protoc-gen-go@v1.3.2to downgrade the version of protoc-gen-go to v.1.3.2,then rebuild proto file, problem has been resolved.

[johnbellone]

I haven't been able to get past this part even with the suggestion that @Eson-Jia had.

[Windrill]

Mine worked for protoc-gen-go version 1.3.0, protoc (libprotoc) version 3.11.2, which was a downgrade from the latest protoc-gen-go version, while the relatively recent protoc's version stayed the same.
Not sure if this meant the the newest protoc currently could not support the newest protoc-gen-go.
github.com/golang/protobuf/protoc-gen-go's version can be changed via git checkout and installing, if the dependency is contained within the gopath/project.
eg. https://stackoverflow.com/questions/53952723/undefined-proto-protopackageisversion3

[johnbellone]

I got it working but had to drop Bazel. It was likely due to my lack of experience with tweaking it.

[hikergit]

for google.golang.org/grpc v1.26.0,I usego get github.com/golang/protobuf/protoc-gen-go@v1.3.2to downgrade the version of protoc-gen-go to v.1.3.2,then rebuild proto file, problem has been resolved.

@Eson-Jia Thanks for the advise, that works for me too. Looks like google.golang.org/grpc v1.26.0 and github.com/golang/protobuf/protoc-gen-go v1.3.2 is a good match. Could you share how you find this out? I hope the grpc official documentation includes a compatibility table.

[dfawley]

google.golang.org/grpc v1.26.0

We don't really support this version of grpc-go anymore. You should be using one of the last 3 releases if at all possible. FWIW we have an example for generating protobuf code here: https://grpc.io/docs/languages/go/quickstart/#regenerate-grpc-code

[storyicon]

You can try installing an older version of protoc-gen-go-grpc through:

go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@ad51f572fd270f2323e3aa2c1d2775cab9087af2

But I would recommend you to use PowerProto。
You can use it for one-click installation, one-click compilation and version control.