rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: timed out waiting for server handshake

[darmawan01]

try to run golang with grpc healt check in container with docker run,
get som problem timed out waiting for server handshake. I was added
GRPC_GO_REQUIRE_HANDSHAKE=off but it still error

Here is my specifications:

• Go version 1.12
• grpc 1.25.1
• google.golang.org/grpc/health/grpc_health_v1 latest version

log when i added GRPC_GO_LOG_VERBOSITY_LEVEL=99 GRPC_GO_LOG_SEVERITY_LEVEL=info

INFO: 2019/11/28 12:35:09 parsed scheme: ""
INFO: 2019/11/28 12:35:09 scheme "" not registered, fallback to default scheme
INFO: 2019/11/28 12:35:09 ccResolverWrapper: sending update to cc: {[{localhost:8000 0  <nil>}] <nil>}
INFO: 2019/11/28 12:35:09 ClientConn switching balancer to "pick_first"
INFO: 2019/11/28 12:35:09 pickfirstBalancer: HandleSubConnStateChange: 0xc000021540, CONNECTING
INFO: 2019/11/28 12:35:29 transport: loopyWriter.run returning. connection error: desc = "transport is closing"
WARNING: 2019/11/28 12:35:29 grpc: addrConn.createTransport failed to connect to {localhost:8000 0  <nil>}: didn't receive server preface in time. Reconnecting...
INFO: 2019/11/28 12:35:29 pickfirstBalancer: HandleSubConnStateChange: 0xc000021540, TRANSIENT_FAILURE
rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: timed out waiting for server handshake

[menghanl]

As said in #2406, the option to not wait for handshake was entirely removed, and the client always expect server to send handshake now.

What server is the client talking to? If you are using cmux, please try soheilhy/cmux#64 (comment).

[darmawan01]

It's working fine if using grpc 1.20.1

[menghanl]

I believe the option was removed in https://github.com/grpc/grpc-go/releases/tag/v1.23.0

• client: remove option to send RPCs before HTTP/2 handshake is completed (client: remove option to send RPCs before HTTP/2 handshake is completed #2904)

[darmawan01]

thanks @menghanl , i will learn about the issues your given.