AWS SES 偶尔抛出 AmazonServiceException无法从传输连接读取数据

如何解决AWS SES 偶尔抛出 AmazonServiceException无法从传输连接读取数据

突然这段代码抛出错误

var credentials = new BasicAWSCredentials(ConfigurationManager.AppSettings["AwsKey"],ConfigurationManager.AppSettings["AwsSecret"]);
var emailClient = new AmazonSimpleEmailServiceClient(credentials,Amazon.RegionEndpoint.EUWest1);
Destination destination = new Destination() {
  ToAddresses = {
      to
    },CcAddresses = new List < string > () {
      copy
    },};
}
var req = new SendEmailRequest {
  Destination = destination,Source = ourEmail,};
var bodyContent = new Amazon.SimpleEmail.Model.Content(body);
var subjectContent = new Amazon.SimpleEmail.Model.Content(subject);
var bodyObj = new Body {
  Html = bodyContent
};
req.Message = new Message(subjectContent,bodyObj);
req.ReplyToAddresses = new List < string > {
  ourEmail
};
var resp = emailClient.SendEmail(req);

偶尔最后一行抛出错误

Amazon.Runtime.AmazonServiceException: A WebException with status SendFailure was thrown. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.sockets.socketException: An existing connection was forcibly closed by the remote host
   at System.Net.sockets.NetworkStream.Read(Byte[] buffer,Int32 offset,Int32 size)
   --- End of inner exception stack trace ---
   at System.Net.sockets.NetworkStream.Read(Byte[] buffer,Int32 size)
   at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer,Int32 count)
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer,AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message,AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst,Byte[] buffer,AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext,ContextCallback callback,Object state,Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,Object state)
   at System.Net.Tlsstream.ProcessAuthentication(LazyAsyncResult result)
   at System.Net.Tlsstream.Write(Byte[] buffer,Int32 size)
   at System.Net.PooledStream.Write(Byte[] buffer,Int32 size)
   at System.Net.ConnectStream.WriteHeaders(Boolean async)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
   at System.Net.HttpWebRequest.GetRequestStream()
   at Amazon.Runtime.Internal.HttpHandler`1.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\HttpHandler\HttpHandler.cs:line 81
   at Amazon.Runtime.Internal.Unmarshaller.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\Unmarshaller.cs:line 50
   at Amazon.Runtime.Internal.ErrorHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\ErrorHandler\ErrorHandler.cs:line 72
   --- End of inner exception stack trace ---
   at Amazon.Runtime.Internal.WebExceptionHandler.HandleException(IExecutionContext executionContext,WebException exception) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\ErrorHandler\_bcl\WebExceptionHandler.cs:line 44
   at Amazon.Runtime.Internal.ErrorHandler.ProcessException(IExecutionContext executionContext,Exception exception) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\ErrorHandler\ErrorHandler.cs:line 204
   at Amazon.Runtime.Internal.ErrorHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\ErrorHandler\ErrorHandler.cs:line 78
   at Amazon.Runtime.Internal.CallbackHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\CallbackHandler.cs:line 46
   at Amazon.Runtime.Internal.RetryHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\RetryHandler\RetryHandler.cs:line 88
   at Amazon.Runtime.Internal.CallbackHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\CallbackHandler.cs:line 46
   at Amazon.Runtime.Internal.CallbackHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\CallbackHandler.cs:line 46
   at Amazon.Runtime.Internal.ErrorCallbackHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\ErrorCallbackHandler.cs:line 44
   at Amazon.Runtime.Internal.MetricsHandler.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\MetricsHandler.cs:line 40
   at Amazon.Runtime.Internal.RuntimePipeline.InvokeSync(IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\RuntimePipeline.cs:line 136
   at Amazon.Runtime.AmazonServiceClient.Invoke[TRequest,TResponse](TRequest request,IMarshaller`2 marshaller,ResponseUnmarshaller unmarshaller) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\AmazonServiceClient.cs:line 192
   at Amazon.SimpleEmail.AmazonSimpleEmailServiceClient.SendEmail(SendEmailRequest request) in E:\JenkinsWorkspaces\v3-stage-release\AWSDotNetPublic\sdk\src\Services\SimpleEmail\Generated\_bcl45\AmazonSimpleEmailServiceClient.cs:line 2263
   at EmailService.SendEmail(String to,String subject,String body,String copy,String from,Boolean addBss) in C:\....Lib\Email\EmailService.cs:line xxx