Did you ever find a resolution to this?
On Friday, April 14, 2017 at 10:34:06 AM UTC-5, Mark Grimes wrote:
>
> I rebuilt everything and tried your suggestion, but still get the same
> problem. The trace is below. Note that since the first post I've
> implemented TLS credentials so the output will be slightly different, but
> those differences should be irrelevant.
>
> Thanks,
>
> Mark.
>
> kubectl run -it --rm --image=myimage --env="GRPC_TRACE=all"
> --env="GRPC_VERBOSITY=DEBUG" testclient --command /bin/sh
>
> > export GRPC_DNS_RESOLVER=ares
>
> > ping myservice.default.svc.cluster.local
> PING myservice.default.svc.cluster.local (10.0.0.27): 56 data bytes
> 64 bytes from 10.0.0.27: seq=0 ttl=64 time=0.072 ms
> 64 bytes from 10.0.0.27: seq=1 ttl=64 time=0.051 ms
> 64 bytes from 10.0.0.27: seq=2 ttl=64 time=0.093 ms
> ^C
> --- myservice.default.svc.cluster.local ping statistics ---
> 3 packets transmitted, 3 packets received, 0% packet loss
> round-trip min/avg/max = 0.051/0.072/0.093 ms
>
> > myapp -c --verify certChain.pem myservice.default.svc.cluster.local:50051
> Attempting to connect to myservice.default.svc.cluster.local:50051 to run
> a listing
> I0414 13:58:16.368200643 53 ev_epoll_linux.c:93] epoll engine
> will be using signal: 40
> D0414 13:58:16.368613539 53 ev_posix.c:105] Using polling
> engine: epoll
> I0414 13:58:16.368988761 53 init.c:224]
> grpc_init(void)
> I0414 13:58:16.369249843 53 completion_queue.c:137]
> grpc_completion_queue_create(reserved=(nil))
> I0414 13:58:16.369850453 52 init.c:224]
> grpc_init(void)
> I0414 13:58:16.370177696 52 ssl_credentials.c:129]
> grpc_ssl_credentials_create(pem_root_certs=-----BEGIN CERTIFICATE-----
> MIIDKDCCApGgAwIBAgIJAJuzbK6eGlXMMA0GCSqGSIb3DQEBBQUAMGwxCzAJBgNV
> BAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0YXRlMSMwIQYDVQQKExpUZXN0IENlcnRp
> ZmljYXRlIEF1dGhvcml0eTEjMCEGA1UEAxMaVGVzdCBDZXJ0aWZpY2F0ZSBBdXRo
> b3JpdHkwHhcNMTUwMjIyMjM0NTI1WhcNMjUwMjE5MjM0NTI1WjBsMQswCQYDVQQG
> EwJBVTETMBEGA1UECBMKU29tZS1TdGF0ZTEjMCEGA1UEChMaVGVzdCBDZXJ0aWZp
> Y2F0ZSBBdXRob3JpdHkxIzAhBgNVBAMTGlRlc3QgQ2VydGlmaWNhdGUgQXV0aG9y
> aXR5MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhPJZAxch5dyQBpOtAd+si
> VlRbPBSC2z7mUOmuF12+6/AMVT9iQjrIqNSiu5odz+alynNSHnO9N0b0GoBq3i9K
> qYMll4SFKbVi/Bw2bk8U/Sr+Eih8x6YtaPkQ1vA+xLv90HrzL1K/6ZDg3ECnUJpj
> jSprk6hYFYsPGJmRcfImXwIDAQABo4HRMIHOMB0GA1UdDgQWBBS8hNSp+aIX71C6
> hVuTNrcy8U9YFjCBngYDVR0jBIGWMIGTgBS8hNSp+aIX71C6hVuTNrcy8U9YFqFw
> pG4wbDELMAkGA1UEBhMCQVUxEzARBgNVBAgTClNvbWUtU3RhdGUxIzAhBgNVBAoT
> GlRlc3QgQ2VydGlmaWNhdGUgQXV0aG9yaXR5MSMwIQYDVQQDExpUZXN0IENlcnRp
> ZmljYXRlIEF1dGhvcml0eYIJAJuzbK6eGlXMMAwGA1UdEwQFMAMBAf8wDQYJKoZI
> hvcNAQEFBQADgYEAvmudqofZ9WbCxf4uMTFdcF4Ak/nGG9Ie0i2vgZ6GjbdQVfxN
> IR7gzfGXuzNhgZkVfNLhZkvcmYoj7a/VYJcyxbOESZqjk4ZrmINP+e3852Y4yfyf
> z7shjjgV0+Dl5tC3ZrAd9FphbJno84aCWlS4KTpMSsJwa25xLLpAn4dkOfM=
> -----END CERTIFICATE-----
> , pem_key_cert_pair=(nil), reserved=(nil))
> I0414 13:58:16.374920331 52 init.c:224]
> grpc_init(void)
> I0414 13:58:16.375177843 52 init.c:229]
> grpc_shutdown(void)
> I0414 13:58:16.375475302 52 secure_channel_create.c:100]
> grpc_secure_channel_create(creds=0x12a6360,
> target=myservice.default.svc.cluster.local:50051, args=0x7ffdac139a60,
> reserved=(nil))
> I0414 13:58:16.376254751 52 init.c:224]
> grpc_init(void)
> I0414 13:58:16.376616323 52 channel.c:277]
> grpc_channel_register_call(channel=0x12b12e0,
> method=/grpcendpoint.Endpoint/endpointVersion, host=(null), reserved=(nil))
> I0414 13:58:16.376902331 52 channel.c:277]
> grpc_channel_register_call(channel=0x12b12e0,
> method=/grpcendpoint.Endpoint/listCollections, host=(null), reserved=(nil))
> I0414 13:58:16.377145645 52 channel.c:277]
> grpc_channel_register_call(channel=0x12b12e0,
> method=/grpcendpoint.Endpoint/getCollection, host=(null), reserved=(nil))
> I0414 13:58:16.377479987 52 credentials.c:94]
> grpc_channel_credentials_release(creds=0x12a6360)
> I0414 13:58:16.377739511 52 init.c:229]
> grpc_shutdown(void)
> I0414 13:58:16.378190183 52 channel.c:308]
> grpc_channel_create_registered_call(channel=0x12b12e0, parent_call=(nil),
> propagation_mask=ffff, completion_queue=0x7f2404001ce0,
> registered_call_handle=0x12acca0, deadline=gpr_timespec { tv_sec:
> 9223372036854775807, tv_nsec: 0, clock_type: 1 }, reserved=(nil))
> I0414 13:58:16.378480207 52 grpc_context.c:41]
> grpc_census_call_set_context(call=0x12b19a0, census_context=(nil))
> I0414 13:58:16.378985768 52 call.c:1708]
> grpc_call_start_batch(call=0x12b19a0, ops=0x7ffdac1397e0, nops=3,
> tag=0x12a71f8, reserved=(nil))
> I0414 13:58:16.379254122 52 call.c:1364] ops[0]:
> SEND_INITIAL_METADATA
> I0414 13:58:16.379508782 52 call.c:1364] ops[1]:
> SEND_MESSAGE ptr=0x12a6dd0
> I0414 13:58:16.379743213 52 call.c:1364] ops[2]:
> SEND_CLOSE_FROM_CLIENT
> I0414 13:58:16.380039441 52 client_channel.c:882]
> OP[client-channel:0x12b2458]: [COVERED] SEND_INITIAL_METADATA{key=3a 70 61
> 74 68 ':path' value=2f 67 72 70 63 65 6e 64 70 6f 69 6e 74 2e 45 6e 64 70
> 6f 69 6e 74 2f 6c 69 73 74 43 6f 6c 6c 65 63 74 69 6f 6e 73
> '/grpcendpoint.Endpoint/listCollections', key=3a 61 75 74 68 6f 72 69 74 79
> ':authority' value=74 65 6c 65 68 69 73 74 2e 64 65 66 61 75 6c 74 2e 73 76
> 63 2e 63 6c 75 73 74 65 72 2e 6c 6f 63 61 6c 3a 35 30 30 35 31
> 'myservice.default.svc.cluster.local:50051', key=67 72 70 63 2d 65 6e 63 6f
> 64 69 6e 67 'grpc-encoding' value=69 64 65 6e 74 69 74 79 'identity',
> key=67 72 70 63 2d 61 63 63 65 70 74 2d 65 6e 63 6f 64 69 6e 67
> 'grpc-accept-encoding' value=69 64 65 6e 74 69 74 79 2c 64 65 66 6c 61 74
> 65 2c 67 7a 69 70 'identity,deflate,gzip'}
> SEND_MESSAGE:flags=0x00000000:len=0 SEND_TRAILING_METADATA{}
> I0414 13:58:16.380528137 52 call.c:1708]
> grpc_call_start_batch(call=0x12b19a0, ops=0x7ffdac139820, nops=3,
> tag=0x12a7298, reserved=(nil))
> I0414 13:58:16.380786273 52 call.c:1364] ops[0]:
> RECV_INITIAL_METADATA ptr=0x12a72c0
> I0414 13:58:16.381093046 52 call.c:1364] ops[1]:
> RECV_MESSAGE ptr=0x12a72e8
> I0414 13:58:16.381368604 52 call.c:1364] ops[2]:
> RECV_STATUS_ON_CLIENT metadata=0x12a7308 status=0x12a7320 details=0x12a7328
> I0414 13:58:16.381607886 52 client_channel.c:882]
> OP[client-channel:0x12b2458]: [COVERED] RECV_INITIAL_METADATA RECV_MESSAGE
> RECV_TRAILING_METADATA
> I0414 13:58:16.381897570 53 completion_queue.c:389]
> grpc_completion_queue_next(cc=0x7f2404001ce0, deadline=gpr_timespec {
> tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 }, reserved=(nil))
> I0414 13:58:16.382586568 54 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178296.382558164","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:16.382915126 54 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:16.383721741 54 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: IDLE --> TRANSIENT_FAILURE [new_lb+resolver]
> error=0x7f23fc000ba0 {"created":"@1492178296.383708704","description":"No
> load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:17.383541404 55 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178297.383519265","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:17.384161567 55 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:17.384474818 55 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000c00
> {"created":"@1492178297.384464441","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:18.384748114 56 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178298.384725600","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:18.384965866 56 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:18.385023236 56 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000ba0
> {"created":"@1492178298.385013911","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:19.385829174 57 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178299.385807307","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:19.386378656 57 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:19.386736068 57 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000d00
> {"created":"@1492178299.386711433","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:20.387789525 58 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178300.387767146","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:20.388320888 58 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:20.388615388 58 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000d60
> {"created":"@1492178300.388604683","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:21.388326313 59 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178301.388301905","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:21.389040345 59 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:21.389322099 59 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc0011d0
> {"created":"@1492178301.389311229","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:22.388716129 60 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178302.388693261","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:22.389463664 60 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:22.389888415 60 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000c00
> {"created":"@1492178302.389876717","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:23.389602658 61 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178303.389580245","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:23.390165421 61 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:23.390466294 61 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000e50
> {"created":"@1492178303.390455437","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> I0414 13:58:24.389912635 62 dns_resolver.c:192] dns
> resolution failed (will retry):
> {"created":"@1492178304.389883555","description":"OS
> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>
> or service not
> known","syscall":"getaddrinfo","target_address":"myservice.default.svc.cluster.local:50051"}
> D0414 13:58:24.389948542 62 dns_resolver.c:198] retrying in
> 1.000000000 seconds
> D0414 13:58:24.389964969 62 connectivity_state.c:163] SET:
> 0x12b1448 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
> [new_lb+resolver] error=0x7f23fc000d60
> {"created":"@1492178304.389957359","description":"No load balancing
> policy","file":"src/core/ext/client_channel/client_channel.c","file_line":273}
> ^C
>
> On 13 April 2017 at 22:25, Yuchen Zeng <[email protected] <javascript:>>
> wrote:
>
>> Currently grpc is using get getaddrinfo to do the name resolution. I'm
>> investigating why ping can resolve the name of the service but getaddrinfo
>> can not.
>> Could you please also try it with --env="GRPC_DNS_RESOLVER=ares" on
>> master? It will use a c-ares based resolver instead of getaddrinfo.
>>
>> On Sunday, April 9, 2017 at 3:27:38 PM UTC-7, Mark Grimes wrote:
>>>
>>> Yes, I tried that and get the same problem. Pinging the fully qualified
>>> name works fine (so I know it is the correct long name).
>>>
>>> On 7 April 2017 at 13:22, Jan Tattermusch <[email protected]> wrote:
>>>
>>>> Out of curiosity, have you tried with the long DNS name of the service?
>>>> (I think that's something in the sense of
>>>> myservice.default.svc.cluster.local)
>>>>
>>>> On Wednesday, March 15, 2017 at 6:37:30 PM UTC+1, [email protected]
>>>> wrote:
>>>>>
>>>>> Hi,
>>>>> This is about the interplay of gRPC and Kubernetes, but I'm pretty
>>>>> sure the problem is with the gRPC name resolution.
>>>>> I have a gRPC application running on a kubernetes cluster exposed
>>>>> using a headless service. For those that don't know, this means (as I
>>>>> understand it) kubernetes sets up a DNS entry pointing to the application
>>>>> container. If I then try and run the client in the same cluster it hangs
>>>>> during name resolution to the kubernetes service. Connecting directly to
>>>>> the IP address of the service works fine.
>>>>> E.g. with the server already running and listening on port 50051
>>>>>
>>>>> kubectl run -it --rm --image=myimage --env="GRPC_TRACE=all"
>>>>> --env="GRPC_VERBOSITY=DEBUG" testclient --command /bin/sh
>>>>>
>>>>> > ping myservice
>>>>> PING myservice (10.0.0.13): 56 data bytes
>>>>> 64 bytes from 10.0.0.13: seq=0 ttl=64 time=0.121 ms
>>>>> (etc; service name resolves fine)
>>>>>
>>>>> > myapp -c 10.0.0.13:50051 # connect as client to the given server
>>>>> and port using the ip address resolved by ping
>>>>> (loads of debug output, but I get the expected response and everything
>>>>> works fine)
>>>>>
>>>>> > myapp -c myservice:50051
>>>>> (hangs indefinitely trying to resolve the name, full output below)
>>>>>
>>>>> The fact it hangs indefinitely appears to be related to
>>>>> https://github.com/grpc/grpc/issues/9481 (DNS resolver in C core
>>>>> never gives up resolving a nonexistent hostname), except in my case the
>>>>> hostname is valid, as shown by the ping. The container image is busybox
>>>>> plus the C++ application and required libraries. Is there anything gRPC
>>>>> needs in the OS (i.e. my container image) in order to perform name
>>>>> resolution? Ping manages it fine, why not gRPC? Forgive my ignorance of
>>>>> how the underlying name resolution is provided.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Mark.
>>>>>
>>>>> Output when trying to resolve to the service:
>>>>>
>>>>> I0315 17:08:46.596502176 15 ev_epoll_linux.c:85] epoll
>>>>> engine will be using signal: 36
>>>>> D0315 17:08:46.596889365 15 ev_posix.c:106] Using
>>>>> polling engine: epoll
>>>>> I0315 17:08:46.597180247 15 init.c:193]
>>>>> grpc_init(void)
>>>>> I0315 17:08:46.597458188 15 completion_queue.c:139]
>>>>> grpc_completion_queue_create(reserved=(nil))
>>>>> I0315 17:08:46.597765727 14 init.c:193]
>>>>> grpc_init(void)
>>>>> I0315 17:08:46.598071841 14 channel_create.c:235]
>>>>> grpc_insecure_channel_create(target=0xaf2e48, args=0x7ffd594b2fd0,
>>>>> reserved=(nil))
>>>>> I0315 17:08:46.598358396 14 init.c:193]
>>>>> grpc_init(void)
>>>>> I0315 17:08:46.598675472 14 init.c:198]
>>>>> grpc_shutdown(void)
>>>>> I0315 17:08:46.598951207 14 channel.c:263]
>>>>> grpc_channel_register_call(channel=0xaeba20,
>>>>> method=/grpcendpoint.Endpoint/endpointVersion, host=(null),
>>>>> reserved=(nil))
>>>>> I0315 17:08:46.599216112 14 channel.c:263]
>>>>> grpc_channel_register_call(channel=0xaeba20,
>>>>> method=/grpcendpoint.Endpoint/listCollections, host=(null),
>>>>> reserved=(nil))
>>>>> I0315 17:08:46.599476727 14 channel.c:263]
>>>>> grpc_channel_register_call(channel=0xaeba20,
>>>>> method=/grpcendpoint.Endpoint/getCollection, host=(null), reserved=(nil))
>>>>> I0315 17:08:46.599896046 14 channel.c:291]
>>>>> grpc_channel_create_registered_call(channel=0xaeba20, parent_call=(nil),
>>>>> propagation_mask=ffff, completion_queue=0x7fa7c8001b40,
>>>>> registered_call_handle=0xaf1910, deadline=gpr_timespec { tv_sec:
>>>>> 9223372036854775807, tv_nsec: 0, clock_type: 1 }, reserved=(nil))
>>>>> I0315 17:08:46.600314315 14 grpc_context.c:41]
>>>>> grpc_census_call_set_context(call=0xaf4ec0, census_context=(nil))
>>>>> I0315 17:08:46.600804961 14 call.c:1690]
>>>>> grpc_call_start_batch(call=0xaf4ec0, ops=0x7ffd594b2cf0, nops=3,
>>>>> tag=0xaf0318, reserved=(nil))
>>>>> I0315 17:08:46.601111821 14 call.c:1366] ops[0]:
>>>>> SEND_INITIAL_METADATA
>>>>> I0315 17:08:46.601392365 14 call.c:1366] ops[1]:
>>>>> SEND_MESSAGE ptr=0xaebc90
>>>>> I0315 17:08:46.601653874 14 call.c:1366] ops[2]:
>>>>> SEND_CLOSE_FROM_CLIENT
>>>>> I0315 17:08:46.602006491 14 client_channel.c:109]
>>>>> OP[client-channel:0xaf54c8]: SEND_INITIAL_METADATA{key=3a 70 61 74 68
>>>>> ':path' value=2f 67 72 70 63 65 6e 64 70 6f 69 6e 74 2e 45 6e 64 70 6f 69
>>>>> 6e 74 2f 65 6e 64 70 6f 69 6e 74 56 65 72 73 69 6f 6e
>>>>> '/grpcendpoint.Endpoint/endpointVersion', key=3a 61 75 74 68 6f 72 69 74
>>>>> 79
>>>>> ':authority' value=74 65 6c 65 68 69 73 74 3a 35 30 30 35 31
>>>>> 'myservice:50051', key=67 72 70 63 2d 65 6e 63 6f 64 69 6e 67
>>>>> 'grpc-encoding' value=69 64 65 6e 74 69 74 79 'identity', key=67 72 70 63
>>>>> 2d 61 63 63 65 70 74 2d 65 6e 63 6f 64 69 6e 67 'grpc-accept-encoding'
>>>>> value=69 64 65 6e 74 69 74 79 2c 64 65 66 6c 61 74 65 2c 67 7a 69 70
>>>>> 'identity,deflate,gzip'} SEND_MESSAGE:flags=0x00000000:len=0
>>>>> SEND_TRAILING_METADATA{}
>>>>> I0315 17:08:46.602499932 14 call.c:1690]
>>>>> grpc_call_start_batch(call=0xaf4ec0, ops=0x7ffd594b2d30, nops=3,
>>>>> tag=0xaf03b8, reserved=(nil))
>>>>> I0315 17:08:46.602729139 14 call.c:1366] ops[0]:
>>>>> RECV_INITIAL_METADATA ptr=0xaf03e0
>>>>> I0315 17:08:46.603054019 14 call.c:1366] ops[1]:
>>>>> RECV_MESSAGE ptr=0xaf0408
>>>>> I0315 17:08:46.603314856 14 call.c:1366] ops[2]:
>>>>> RECV_STATUS_ON_CLIENT metadata=0xaf0428 status=0xaf0440 details=0xaf0448
>>>>> I0315 17:08:46.603639848 14 client_channel.c:109]
>>>>> OP[client-channel:0xaf54c8]: RECV_INITIAL_METADATA RECV_MESSAGE
>>>>> RECV_TRAILING_METADATA
>>>>> I0315 17:08:46.603924761 15 completion_queue.c:333]
>>>>> grpc_completion_queue_next(cc=0x7fa7c8001b40, deadline=gpr_timespec {
>>>>> tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 }, reserved=(nil))
>>>>> D0315 17:08:46.604521071 16 dns_resolver.c:192] dns
>>>>> resolution failed: {"created":"@1489597726.604500252","description":"OS
>>>>> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>>>>>
>>>>> or service not
>>>>> known","syscall":"getaddrinfo","target_address":"myservice:50051"}
>>>>> D0315 17:08:46.604820308 16 dns_resolver.c:201] retrying
>>>>> immediately
>>>>> D0315 17:08:46.605088317 16 connectivity_state.c:156] SET:
>>>>> 0xaebb68 client_channel: IDLE --> TRANSIENT_FAILURE [new_lb+resolver]
>>>>> error=0x7fa7c0000b90 {"created":"@1489597726.605077608","description":"No
>>>>> load balancing
>>>>> policy","file":"src/core/ext/client_config/client_channel.c","file_line":188}
>>>>> D0315 17:08:47.605552537 17 dns_resolver.c:192] dns
>>>>> resolution failed: {"created":"@1489597727.605530416","description":"OS
>>>>> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>>>>>
>>>>> or service not
>>>>> known","syscall":"getaddrinfo","target_address":"myservice:50051"}
>>>>> D0315 17:08:47.606272692 17 dns_resolver.c:201] retrying
>>>>> immediately
>>>>> D0315 17:08:47.606719769 17 connectivity_state.c:156] SET:
>>>>> 0xaebb68 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
>>>>> [new_lb+resolver] error=0x7fa7c0000bf0
>>>>> {"created":"@1489597727.606709040","description":"No load balancing
>>>>> policy","file":"src/core/ext/client_config/client_channel.c","file_line":188}
>>>>> D0315 17:08:49.501768132 18 dns_resolver.c:192] dns
>>>>> resolution failed: {"created":"@1489597729.501745552","description":"OS
>>>>> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>>>>>
>>>>> or service not
>>>>> known","syscall":"getaddrinfo","target_address":"myservice:50051"}
>>>>> D0315 17:08:49.502278763 18 dns_resolver.c:201] retrying
>>>>> immediately
>>>>> D0315 17:08:49.502683440 18 connectivity_state.c:156] SET:
>>>>> 0xaebb68 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
>>>>> [new_lb+resolver] error=0x7fa7c0000b90
>>>>> {"created":"@1489597729.502672595","description":"No load balancing
>>>>> policy","file":"src/core/ext/client_config/client_channel.c","file_line":188}
>>>>> D0315 17:08:52.737487943 19 dns_resolver.c:192] dns
>>>>> resolution failed: {"created":"@1489597732.737457632","description":"OS
>>>>> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>>>>>
>>>>> or service not
>>>>> known","syscall":"getaddrinfo","target_address":"myservice:50051"}
>>>>> D0315 17:08:52.737695112 19 dns_resolver.c:201] retrying
>>>>> immediately
>>>>> D0315 17:08:52.737751585 19 connectivity_state.c:156] SET:
>>>>> 0xaebb68 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
>>>>> [new_lb+resolver] error=0x7fa7c0000bf0
>>>>> {"created":"@1489597732.737742549","description":"No load balancing
>>>>> policy","file":"src/core/ext/client_config/client_channel.c","file_line":188}
>>>>> D0315 17:08:56.890396846 20 dns_resolver.c:192] dns
>>>>> resolution failed: {"created":"@1489597736.890373998","description":"OS
>>>>> Error","errno":-2,"file":"src/core/lib/iomgr/resolve_address_posix.c","file_line":115,"os_error":"Name
>>>>>
>>>>> or service not
>>>>> known","syscall":"getaddrinfo","target_address":"myservice:50051"}
>>>>> D0315 17:08:56.890592615 20 dns_resolver.c:201] retrying
>>>>> immediately
>>>>> D0315 17:08:56.890664375 20 connectivity_state.c:156] SET:
>>>>> 0xaebb68 client_channel: TRANSIENT_FAILURE --> TRANSIENT_FAILURE
>>>>> [new_lb+resolver] error=0x7fa7c0000b90
>>>>> {"created":"@1489597736.890640201","description":"No load balancing
>>>>> policy","file":"src/core/ext/client_config/client_channel.c","file_line":188}
>>>>> (etc in a seemingly infinite loop)
>>>>>
>>>>
>>>
>
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