title: GRPC Ver 1.22.0 DNS resolution failed
body: <p>When I created the channel for Google Speech Client through the proxy(also PAC), I got the DNS resolution failed.This porblem only occur in my customer side but do not occur in my company proxy. Can you advice for this issue and also what information need for to do this from my customer side?</p>
  
  <p>My environment informations are following.</p>
  
  <blockquote>
    <p>C# / net462 gRPC 1.22.0 , Google.cloud.speech.v1 Windows 10</p>
  </blockquote>
  
  <p>My codes are following.</p>
  
  <pre><code>var cred = GoogleAuthentication.GetServiceAccountCredential(GoogleSpeech.SpeechClient.DefaultScopes);
  ChannelCredentials channelCredentials = cred.ToChannelCredentials();
  Channel channel = new Channel(GoogleSpeech.SpeechClient.DefaultEndpoint.Host,GoogleSpeech.SpeechClient.DefaultEndpoint.Port, channelCredentials);
  GoogleSpeechClient = GoogleSpeech.SpeechClient.Create(channel);
  </code></pre>
  
  <p>Here is my grpc debug log.</p>
  
  <blockquote>
    <p>I0205 11:22:45.653978 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\transport\chttp2\client\secure\secure_channel_create.cc:198:
    grpc_secure_channel_create(creds=00000204FCF267F0,
    target=speech.googleapis.com:443, args=00000204A2666570,
    reserved=0000000000000000) I0205 11:22:45.653978 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1184:
    chand=00000204FDDCC020: creating client_channel for channel stack
    00000204FDDCBFA0 I0205 11:22:45.653978 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=IDLE picker=00000204A2666770
    I0205 11:22:45.653978 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1259:
    chand=00000204FDDCC020: created resolving_lb_policy=000002049E1046E0
    I0205 11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\metadata_array.cc:29:
    grpc_metadata_array_init(array=00000204A2666690) I0205 11:22:45.655974
    0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1922:
    grpc_call_start_batch(call=000002049E2DB960, ops=00000009C19FD620,
    nops=2, tag=00000204A2557130, reserved=0000000000000000) I0205
    11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1526:
    ops[0]: SEND_INITIAL_METADATA key=x-goog-api-client value=67 6c 2d 64
    6f 74 6e 65 74 2f 34 2e 36 2e 32 20 67 63 63 6c 2f 31 2e 32 2e 30 20
    67 61 70 69 63 2f 31 2e 32 2e 30 20 67 61 78 2f 32 2e 39 2e 30 20 67
    72 70 63 2f 31 2e 32 32 2e 30 'gl-dotnet/4.6.2 gccl/1.2.0 gapic/1.2.0
    gax/2.9.0 grpc/1.22.0' I0205 11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1526:
    ops[1]: RECV_STATUS_ON_CLIENT metadata=00000204A2557190
    status=00000204A25571A8 details=00000204A25571B0 I0205 11:22:45.655974
    0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3499:
    chand=00000204FDDCC020 calld=000002049E2DC310: LB pick returned QUEUE
    (connected_subchannel=0000000000000000, error="No Error") I0205
    11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3373:
    chand=00000204FDDCC020 calld=000002049E2DC310: adding to queued picks
    list I0205 11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:283:
    resolving_lb=000002049E1046E0: starting name resolution I0205
    11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=CONNECTING
    picker=00000204A2666AF0 D0205 11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:242:
    Start resolving. I0205 11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3499:
    chand=00000204FDDCC020 calld=000002049E2DC310: LB pick returned QUEUE
    (connected_subchannel=0000000000000000, error="No Error") I0205
    11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1922:
    grpc_call_start_batch(call=000002049E2DB960, ops=00000009C19FD680,
    nops=1, tag=00000204A2557200, reserved=0000000000000000) I0205
    11:22:45.655974 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1526:
    ops[0]: RECV_INITIAL_METADATA ptr=00000204A2557238 I0205
    11:22:45.657332 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1922:
    grpc_call_start_batch(call=000002049E2DB960, ops=00000009C19FDD20,
    nops=1, tag=00000204A2556EC0, reserved=0000000000000000) I0205
    11:22:45.657332 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1526:
    ops[0]: SEND_MESSAGE ptr=00000204FDDE43D0 I0205 11:22:45.677333
    2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:185:
    dns resolution failed (will retry):
    {"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
    I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:299:
    resolving_lb=000002049E1046E0: resolver transient failure:
    {"created":"@1580869365.677000000","description":"DNS resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}
    I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=TRANSIENT_FAILURE
    picker=00000204FAC0CC20 D0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:202:
    retrying in 1000 milliseconds I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3499:
    chand=00000204FDDCC020 calld=000002049E2DC310: LB pick returned
    TRANSIENT_FAILURE (connected_subchannel=0000000000000000,
    error={"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}) I0205
    11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3361:
    chand=00000204FDDCC020 calld=000002049E2DC310: removing from queued
    picks list I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3308:
    chand=00000204FDDCC020 calld=000002049E2DC310: failed to pick
    subchannel:
    error={"created":"@1580869365.677000000","description":"Failed to pick
    subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc","file_line":3528,"referenced_errors":[{"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]} I0205
    11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:688:
    cq_end_op_for_next(cq=000002049E247C30, tag=00000204A2557130,
    error="No Error", done=00007FFDD8C1E1A0, done_arg=000002049E2DC7F0,
    storage=000002049E2DC840) I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:688:
    cq_end_op_for_next(cq=000002049E247C30, tag=00000204A2556EC0,
    error={"created":"@1580869365.677000000","description":"Failed to pick
    subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc","file_line":3528,"referenced_errors":[{"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]},
    done=00007FFDD8C1E1A0, done_arg=000002049E2DC9B0,
    storage=000002049E2DCA00) I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:688:
    cq_end_op_for_next(cq=000002049E247C30, tag=00000204A2557200,
    error={"created":"@1580869365.677000000","description":"Failed to pick
    subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc","file_line":3528,"referenced_errors":[{"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]},
    done=00007FFDD8C1E1A0, done_arg=000002049E2DC8D0,
    storage=000002049E2DC920) I0205 11:22:45.677333 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:3337:
    chand=00000204FDDCC020 calld=000002049E2DC310: cancelling queued pick:
    error={"created":"@1580869365.677000000","description":"Failed to pick
    subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc","file_line":3528,"referenced_errors":[{"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]}
    self=00000204FDD77F90 calld->pick_canceller=0000000000000000 I0205
    11:22:45.677333 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:1063: RETURN_EVENT[000002049E247C30]: OP_COMPLETE: tag:00000204A2557130 OK
    I0205 11:22:45.677333 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:963:
    grpc_completion_queue_next(cq=000002049E247C30, deadline=gpr_timespec
    { tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 },
    reserved=0000000000000000) I0205 11:22:45.677333 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:1063: RETURN_EVENT[000002049E247C30]: OP_COMPLETE: tag:00000204A2556EC0
    ERROR I0205 11:22:45.677333 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:963:
    grpc_completion_queue_next(cq=000002049E247C30, deadline=gpr_timespec
    { tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 },
    reserved=0000000000000000) I0205 11:22:45.677333 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:1063: RETURN_EVENT[000002049E247C30]: OP_COMPLETE: tag:00000204A2557200
    ERROR I0205 11:22:45.678195 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:963:
    grpc_completion_queue_next(cq=000002049E247C30, deadline=gpr_timespec
    { tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 },
    reserved=0000000000000000) D0205 11:22:45.698018 2218855401520
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:242:
    Start resolving. I0205 11:22:45.698018 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:185:
    dns resolution failed (will retry):
    {"created":"@1580869365.698000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
    I0205 11:22:45.698018 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:299:
    resolving_lb=00000204A258E6E0: resolver transient failure:
    {"created":"@1580869365.698000000","description":"DNS resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.698000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}
    I0205 11:22:45.698987 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCDBE0: update: state=TRANSIENT_FAILURE
    picker=000002049E1EE100 D0205 11:22:45.698987 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:202:
    retrying in 142172 milliseconds I0205 11:22:45.782621 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1922:
    grpc_call_start_batch(call=000002049E2DB960, ops=00000009C05FE160,
    nops=1, tag=00000204A2557130, reserved=0000000000000000) I0205
    11:22:45.782621 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:1526:
    ops[0]: RECV_MESSAGE ptr=00000204A2557180 I0205 11:22:45.782621 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:688:
    cq_end_op_for_next(cq=000002049E247C30, tag=00000204A2557130,
    error={"created":"@1580869365.677000000","description":"Failed to pick
    subchannel","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc","file_line":3528,"referenced_errors":[{"created":"@1580869365.677000000","description":"Resolver
    transient
    failure","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc","file_line":307,"referenced_errors":[{"created":"@1580869365.677000000","description":"DNS
    resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869365.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is
    known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]},
    done=00007FFDD8C1E1A0, done_arg=000002049E2DCA90,
    storage=000002049E2DCAE0) I0205 11:22:45.782621 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:1063: RETURN_EVENT[000002049E247C30]: OP_COMPLETE: tag:00000204A2557130
    ERROR I0205 11:22:45.782621 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\completion_queue.cc:963:
    grpc_completion_queue_next(cq=000002049E247C30, deadline=gpr_timespec
    { tv_sec: 9223372036854775807, tv_nsec: 0, clock_type: 1 },
    reserved=0000000000000000) I0205 11:22:45.783619 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc:573:
    grpc_call_unref(c=000002049E2DB960) I0205 11:22:46.370273 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\security\credentials\credentials.cc:43:
    grpc_channel_credentials_release(creds=00000204FCF267F0) I0205
    11:22:46.370273 0
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\security\credentials\credentials.cc:43:
    grpc_channel_credentials_release(creds=000002049E368640) D0205
    11:22:46.676327 2218857935696
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:242:
    Start resolving. I0205 11:22:46.677361 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:185:
    dns resolution failed (will retry):
    {"created":"@1580869366.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
    I0205 11:22:46.677361 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:299:
    resolving_lb=000002049E1046E0: resolver transient failure:
    {"created":"@1580869366.677000000","description":"DNS resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869366.677000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}
    I0205 11:22:46.677361 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=TRANSIENT_FAILURE
    picker=000002049E0947E0 D0205 11:22:46.677361 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:202:
    retrying in 1616 milliseconds D0205 11:22:48.293939 2218855401520
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:242:
    Start resolving. I0205 11:22:48.294441 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:185:
    dns resolution failed (will retry):
    {"created":"@1580869368.294000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
    I0205 11:22:48.294441 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:299:
    resolving_lb=000002049E1046E0: resolver transient failure:
    {"created":"@1580869368.294000000","description":"DNS resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869368.294000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}
    I0205 11:22:48.294441 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=TRANSIENT_FAILURE
    picker=000002049E094E60 D0205 11:22:48.294441 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:202:
    retrying in 2336 milliseconds D0205 11:22:50.629492 2218857935696
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:242:
    Start resolving. I0205 11:22:50.653821 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc:185:
    dns resolution failed (will retry):
    {"created":"@1580869370.653000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
    I0205 11:22:50.653821 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolving_lb_policy.cc:299:
    resolving_lb=000002049E1046E0: resolver transient failure:
    {"created":"@1580869370.654000000","description":"DNS resolution
    failed","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\resolver\dns\native\dns_resolver.cc","file_line":190,"grpc_status":14,"referenced_errors":[{"created":"@1580869370.653000000","description":"OS
    Error","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No
    such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}
    I0205 11:22:50.653821 2218856014768
    T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\ext\filters\client_channel\client_channel.cc:1087:
    chand=00000204FDDCC020: update: state=TRANSIENT_FAILURE
    picker=000002049E0948C0 D0205 11:22:50.653821 221885601</p>
  </blockquote>