【发布时间】:2020-03-16 21:07:00
【问题描述】:
我有一个 WCF 服务(不是通过 IIS 托管),并且我有另一个应用程序通过网络 TCP 与我的 WCF 通信。除了长时间运行之外,一切都很好。我的 WCF 可能会执行诸如运行查询或备份数据库等任务。这些任务可能需要几分钟或几小时才能完成。异步执行这些任务也不是一种选择。
问题:在 15 分钟标记处,套接字连接被中止,我似乎无法弄清楚这是从哪里来的......
WCF服务的配置如下:
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="NetTcpBindingConfigurationForMyWCF"
openTimeout="24:00:00"
closeTimeout="24:00:00"
sendTimeout="24:00:00"
receiveTimeout="24:00:00"
maxReceivedMessageSize="9223372036854775807"
transferMode="Streamed">
<readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" />
</binding>
</netTcpBinding>
</bindings>
<services>
<service name="Namespace.MyWCF">
<endpoint address=""
binding="netTcpBinding"
bindingConfiguration="NetTcpBindingConfigurationForMyWCF"
name="NetTcpBindingEndpointMyWCF"
contract="MyWCF.IMyWCF" />
<endpoint address="mex"
binding="mexTcpBinding"
bindingConfiguration=""
name="MexTcpBindingEndpoint"
contract="IMetadataExchange" />
<host>
<baseAddresses>
<add baseAddress="net.tcp://SQLServer/MyWCF" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="">
<dataContractSerializer maxItemsInObjectGraph="2147483646"/>
<serviceThrottling maxConcurrentCalls="1000" maxConcurrentInstances="1000" maxConcurrentSessions="1000"/>
<serviceMetadata httpGetEnabled="false" httpsGetEnabled="false" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
这是我的应用程序的配置:
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="NetTcpBindingConfigurationForMyWCF"
openTimeout="24:00:00"
closeTimeout="24:00:00"
sendTimeout="24:00:00"
receiveTimeout="24:00:00"
maxReceivedMessageSize="9223372036854775807"
transferMode="Streamed">
<readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" />
</binding>
</netTcpBinding>
</bindings>
<client>
<endpoint address="net.tcp://SQLServer/MyWCF"
binding="netTcpBinding"
bindingConfiguration="NetTcpBindingConfigurationForMyWCF"
contract="MyWCF.IMyWCF"
name="NetTcpBindingEndpointMyWCF">
</endpoint>
</client>
到目前为止,这是我拼命尝试的方法,但没有任何运气:
- 将所有超时值设置为 24 小时
- 为 maxConcurrentCalls、maxConcurrentInstances 和 maxConcurrentSessions 添加了较大值的 serviceThrottling 配置
- 禁用两台服务器上的防火墙
- 启用 nettcpbinding 端口共享
- 启用 inactivityTimeout = 24h 的可靠会话
无论我尝试什么,15 分钟后我都会收到以下错误:
Exception msg: An existing connection was forcibly closed by the remote host
Exception type: System.Net.Sockets.SocketException
Stack trace: at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
Exception msg: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '23.23:59:59.9843758'.
Exception type: System.ServiceModel.CommunicationException
Stack trace: at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
at System.ServiceModel.Channels.SocketConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.DelegatingConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.ConnectionStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.Security.NegotiateStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.NegotiateStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
【问题讨论】:
-
我认为处理这些耗时任务的最佳方法是异步执行或设置为 One-Way。然后我们将处理结果记录在数据库中或设置在
字典中,key为TaskID,Value为处理结果。此外,消息队列可能是另一种选择。 -
@Abraham 是的,这将是我的下一步。考虑返回一个句柄,允许调用函数定期检查操作状态
标签: sockets wcf service connection net-tcp