Mono 3.0 の下で Gentoo Linux (2.6.32-gentoo-r7) で WCF サーバーを実行し、Windows 7 で WCF クライアントを実行すると、かなり断続的なエラーが発生します。
クライアント側では、次の例外が発生します。
System.ServiceModel.CommunicationException: An error occurred while receiving the HTTP response to {myendpoint}.
This could be due to the service endpoint binding not using the HTTP protocol.
This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down).
See server logs for more details.
---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive.
---> 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.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
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 offset, Int32 size)
at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at {the WCF method call}....
サーバー側では、次のようになります。
OnUnhandledException:Fatal Error: Read failure
InnerException: interrupted
at System.Net.Sockets.NetworkStream.Read (System.Byte[] buffer, Int32 offset, Int32 size) [0x00000] in <filename unknown>:0
at System.Net.RequestStream.Read (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at System.IO.StreamReader.ReadBuffer () [0x00000] in <filename unknown>:0
at System.IO.StreamReader.Read (System.Char[] buffer, Int32 index, Int32 count) [0x00000] in <filename unknown>:0
at Mono.Xml2.XmlTextReader.ReadTextReader (Int32 remained) [0x00000] in <filename unknown>:0
at Mono.Xml2.XmlTextReader.PeekChar () [0x00000] in <filename unknown>:0
at Mono.Xml2.XmlTextReader.ReadContent () [0x00000] in <filename unknown>:0
at Mono.Xml2.XmlTextReader.Read () [0x00000] in <filename unknown>:0
at System.Xml.XmlTextReader.Read () [0x00000] in <filename unknown>:0
at System.Xml.XmlSimpleDictionaryReader.Read () [0x00000] in <filename unknown>:0
at System.Xml.XmlReader.MoveToContent () [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.XmlReaderMessage.ReadEnvelopeStart () [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.XmlReaderMessage..ctor (System.ServiceModel.Channels.MessageVersion version, System.Xml.XmlDictionaryReader reader, Int32 maxSizeOfHeaders) [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.Message.CreateMessage (System.Xml.XmlDictionaryReader envelopeReader, Int32 maxSizeOfHeaders, System.ServiceModel.Channels.MessageVersion version) [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.TextMessageEncoder.ReadMessage (System.IO.Stream stream, Int32 maxSizeOfHeaders, System.String contentType) [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.Http.HttpReplyChannel.CreatePostMessage (System.ServiceModel.Channels.Http.HttpContextInfo ctxi) [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.Http.HttpReplyChannel.TryReceiveRequest (TimeSpan timeout, System.ServiceModel.Channels.RequestContext& context) [0x00000] in <filename unknown>:0
at System.ServiceModel.Channels.ReplyChannelBase.<BeginTryReceiveRequest>m__10 (TimeSpan tout, System.ServiceModel.Channels.RequestContext& ctx) [0x00000] in <filename unknown>:0
クライアントが WCF メソッドの呼び出しを試みているように見えますが、リクエストを読み取っているサーバーで致命的な読み取りエラーが発生しました。そのような場合に予想されるように、クライアントはCommunicationExpectionでアサートします。しかし、サービス側で何が問題を引き起こしたのかわかりません。また、スレッドで発生しているため、私が制御できるとは思えないので、何かできることがあれば. この問題をトリアージする方法の手がかりをいただければ幸いです。