WCF开发常见问题：“There is already a listener on IP endpoint 0.0.0.0:4503”-白红宇

在寄宿到控制台的WCF服务启动时或者运行期间，经常自己停掉，通过日志记录可以看到

2010/10/27 10:19:08 : There is already a listener on IP endpoint 0.0.0.0:4503. Make sure that you are not trying to use this endpoint multiple times in your application and that there are no other applications listening on this endpoint.

应该是同一个端口被多个服务监听了，查了一下服务的配置，果然如此

代码

service

behaviorConfiguration

="WCFService.Behavior"

name

="WCFService.SynchronizationService"

host

baseAddresses

add

baseAddress

="net.tcp://localhost:4503/SynchronizationService"

baseAddresses

host

endpoint

address

=""

binding

="netTcpBinding"

contract

="WCFService.ISynchronizationService"

bindingConfiguration

="netTcpBindConfig"

></

endpoint

address

="mex"

binding

="mexTcpBinding"

contract

="IMetadataExchange"

></

endpoint

service

behaviorConfiguration

="WCFService.Behavior"

name

="AuthenticateService"

host

baseAddresses

add

baseAddress

="net.tcp://localhost:4503/AuthenticateService"

baseAddresses

host

endpoint

address

=""

binding

="netTcpBinding"

contract

="IAuthenticateService"

bindingConfiguration

="netTcpBindConfig"

></

endpoint

address

="mex"

binding

="mexTcpBinding"

contract

="IMetadataExchange"

></

endpoint

service

于是将其中一个服务的端口改掉成4504即可。

为了保证端口的唯一性，首先这个端口不能是常见的系统端口，其次不能是其他服务所用的端口。

本文转自wengyuli 51CTO博客，原文链接：http://blog.51cto.com/wengyuli/586702，如需转载请自行联系原作者