I0221 01:44:50.847989 123145551552512 /Volumes/BuildData/tmpfs/src/github/grpc/workspace_csharp_macos_dbg_native/src/core/lib/surface/init.cc:209: grpc_shutdown(void)
Caught exception in native callback System.ExecutionEngineException: String conversion error: Illegal byte sequence encounted in the input.
  at (wrapper managed-to-native) System.Runtime.InteropServices.Marshal.PtrToStringAnsi(intptr)
  at Grpc.Core.Internal.NativeLogRedirector.HandleWrite (System.IntPtr fileStringPtr, System.Int32 line, System.UInt64 threadId, System.IntPtr severityStringPtr, System.IntPtr msgPtr) [0x0002b] in <06b8f23a434245b8b944cae9f284da39>:0
Caught exception in native callback System.ExecutionEngineException: String conversion error: Illegal byte sequence encounted in the input.
  at (wrapper managed-to-native) System.Runtime.InteropServices.Marshal.PtrToStringAnsi(intptr)
  at Grpc.Core.Internal.NativeLogRedirector.HandleWrite (System.IntPtr fileStringPtr, System.Int32 line, System.UInt64 threadId, System.IntPtr severityStringPtr, System.IntPtr msgPtr) [0x0002b] in <06b8f23a434245b8b944cae9f284da39>:0
Run Settings
    Number of Test Workers: 1
    Work Directory: /Volumes/BuildData/tmpfs/src/github/grpc/workspace_csharp_macos_dbg_native
    Internal Trace: Off
Test Run Summary
  Overall result: Passed
  Test Count: 1, Passed: 1, Failed: 0, Warnings: 0, Inconclusive: 0, Skipped: 0
  Start time: 2019-02-21 09:44:38Z
    End time: 2019-02-21 09:44:50Z
    Duration: 12.626 seconds
Caught exception in native callback System.Threading.ThreadAbortException: Thread was being aborted.
  at (wrapper managed-to-native) System.Net.Sockets.Socket.Socket_internal(System.Net.Sockets.Socket,System.Net.Sockets.AddressFamily,System.Net.Sockets.SocketType,System.Net.Sockets.ProtocolType,int&)
  at System.Net.Sockets.Socket..ctor (System.Net.Sockets.AddressFamily addressFamily, System.Net.Sockets.SocketType socketType, System.Net.Sockets.ProtocolType protocolType) [0x00040] in <23340a11bb41423aa895298bf881ed68>:0
  at Grpc.IntegrationTesting.SocketUsingLogger.MyLog (System.Action delegateLog) [0x00008] in <4b10b0d1c4f74d13b594ef0093ed75c9>:0
  at Grpc.IntegrationTesting.SocketUsingLogger.Info (System.String message) [0x00015] in <4b10b0d1c4f74d13b594ef0093ed75c9>:0
  at Grpc.Core.Internal.NativeLogRedirector.HandleWrite (System.IntPtr fileStringPtr, System.Int32 line, System.UInt64 threadId, System.IntPtr severityStringPtr, System.IntPtr msgPtr) [0x0007a] in <06b8f23a434245b8b944cae9f284da39>:0
2019-02-21 01:49:42,366 TIMEOUT: csharp.Grpc.IntegrationTesting.ExternalDnsWithTracingClientServerTest [pid=86438, time=304.5sec]
2019-02-21 01:49:42,370 FAILED: csharp.Grpc.IntegrationTesting.ExternalDnsWithTracingClientServerTest
2019-02-21 01:49:42,413 START: tools/run_tests/helper_scripts/post_tests_csharp.sh
2019-02-21 01:49:42,425 PASSED: tools/run_tests/helper_scripts/post_tests_csharp.sh [time=0.0sec, retries=0:0]
2019-02-21 01:49:42,427 FAILED: Some tests failed
2019-02-21 01:49:42,969 FAILED: run_tests_csharp_macos_dbg_native [ret=2, pid=80570, time=452.4sec]