On Tue, Jul 13, 2021 at 4:25 AM 'Menghan Li' via grpc.io
<grpc-io@googlegroups.com> wrote:
>
> Yes, this is expected. The connection cannot be created, because the server
> is expecting a handshake, but the client is not configured to do it.
>
> The only thing is, I would expect a better error message.
> Can you check the client and server logs and see if there's any information?
> https://github.com/grpc/grpc-go#how-to-turn-on-logging
On the server:
WARNING: 2021/07/14 08:38:25 [core] grpc: Server.Serve failed to
complete security handshake from "[::1]:56653": tls: first record does
not look like a TLS handshake
On the client:
INFO: 2021/07/14 08:38:25 [core] parsed scheme: ""
INFO: 2021/07/14 08:38:25 [core] scheme "" not registered, fallback to
default scheme
INFO: 2021/07/14 08:38:25 [core] ccResolverWrapper: sending update to
cc: {[{localhost:50051 <nil> 0 <nil>}] <nil> <nil>}
INFO: 2021/07/14 08:38:25 [core] ClientConn switching balancer to "pick_first"
INFO: 2021/07/14 08:38:25 [core] Channel switches to new LB policy "pick_first"
INFO: 2021/07/14 08:38:25 [core] Subchannel Connectivity change to CONNECTING
INFO: 2021/07/14 08:38:25 [core] blockingPicker: the picked transport
is not ready, loop back to repick
INFO: 2021/07/14 08:38:25 [core] Subchannel picks a new address
"localhost:50051" to connect
INFO: 2021/07/14 08:38:25 [core] pickfirstBalancer:
UpdateSubConnState: 0x14000113d30, {CONNECTING <nil>}
INFO: 2021/07/14 08:38:25 [core] Channel Connectivity change to CONNECTING
INFO: 2021/07/14 08:38:25 [core] Subchannel Connectivity change to
TRANSIENT_FAILURE
INFO: 2021/07/14 08:38:25 [core] pickfirstBalancer:
UpdateSubConnState: 0x14000113d30, {TRANSIENT_FAILURE connection
closed}
INFO: 2021/07/14 08:38:25 [core] Channel Connectivity change to
TRANSIENT_FAILURE
----
# My error logs
2021/07/14 08:38:25 Error getUser
2021/07/14 08:38:25 rpc error: code = Unavailable desc = connection closed
----
INFO: 2021/07/14 08:38:25 [transport] transport: loopyWriter.run
returning. connection error: desc = "transport is closing"
The above client behavior is without WithBlock(). When I specify
WithBlock(), the above connection attempt essentially continues (as
expected - since it is a TRANSIENT_FAILURE).
The interesting thing however which now explains my original query is
when I insert a time.Sleep() between establishing the connection and
calling the RPC method, i do see the above logs as well. My original
confusion was that I should have got the error due to TLS before I
made the RPC method, not when making the RPC method. However, I have
got that clarified now with the time.Sleep(..) and the logging.
Thanks. If there is any further investigation I can do, I would be keen to know.
Best Regards,
Amit
>
> Thanks,
> Menghan
>
> On Friday, July 2, 2021 at 1:26:50 AM UTC-7 amits...@gmail.com wrote:
>>
>> Hello all,
>>
>> I have a Go server configured to use self-signed TLS certs. When I
>> specify the certificate to the client, it all works great.
>>
>> When I try to connect to the server over an insecure channel, it seems
>> that the channel gets established, but i get an error when i make the
>> RPC method call:
>>
>> 2021/07/02 17:37:04 Error getUser
>> 2021/07/02 17:37:04 rpc error: code = Unavailable desc = connection closed
>>
>> Is this expected?
>>
>> Thanks,
>> Amit.
>
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