Azure DevOps job not terminated (completed)

Trace:

```
| Requests/sec | 500,012 | |
| Requests/sec (max) | 513,757 | |
| Read throughput (MB/s) | 175.91 | |

SendTaskCompletedEventAsync failed: https://dev.azure.com/dnceng//7ea9116e-9fac-403d-b258-b31fcf1bb293/_apis/distributedtask/hubs/build/plans/ec7bd787-0156-43f1-a523-6332584bd2bc/events?api-version=2.0-preview.1
System.Net.Http.HttpRequestException: An error occurred while sending the request.
---> System.IO.IOException: Unable to read data from the transport connection: Connection reset by peer.
---> System.Net.Sockets.SocketException (104): Connection reset by peer
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.CreateException(SocketError error, Boolean forAsyncThrow)
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ReceiveAsync(Socket socket, CancellationToken cancellationToken)
at System.Net.Sockets.NetworkStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
at System.Net.Security.SslStream.EnsureFullTlsFrameAsync[TIOAdapter](CancellationToken cancellationToken)
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
at System.Net.Security.SslStream.EnsureFullTlsFrameAsync[TIOAdapter](CancellationToken cancellationToken)
at System.Net.Security.SslStream.ReadAsyncInternal[TIOAdapter](Memory`1 buffer, CancellationToken cancellationToken)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.InvokeContinuation(Action`1 continuation, Object state, Boolean forceAsync, Boolean requiresExecutionContextFlow)
at System.Net.Sockets.SocketAsyncEngine.System.Threading.IThreadPoolWorkItem.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
--- End of stack trace from previous location ---

--- End of inner exception stack trace ---
at System.Net.Security.SslStream.EnsureFullTlsFrameAsync[TIOAdapter](CancellationToken cancellationToken)
at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
at System.Net.Security.SslStream.ReadAsyncInternal[TIOAdapter](Memory`1 buffer, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
at System.Net.Http.HttpConnection.g__ReadAheadWithZeroByteReadAsync|44_0()
at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at Microsoft.Crank.AzureDevOpsWorker.RetryHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) in /_/src/Microsoft.Crank.AzureDevOpsWorker/RetryHandler.cs:line 42
at System.Net.Http.HttpClient.g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at Microsoft.Crank.AzureDevOpsWorker.DevopsMessage.PostDataAsync(String url, String requestBody) in /_/src/Microsoft.Crank.AzureDevOpsWorker/DevopsMessage.cs:line 314
at Microsoft.Crank.AzureDevOpsWorker.DevopsMessage.SendTaskCompletedEventAsync(ResultTypes resultType) in /_/src/Microsoft.Crank.AzureDevOpsWorker/DevopsMessage.cs:line 123
Stopping process id: 7319
[04:18:50.475] Job completed
[06:01:45.832] Processing message '{MessageId:b9443beb8f1b4bda80aaba69b129d64b}'
```


The `SendTaskCompletedEventAsync` should eventually succeed, with any status.