c# - The request channel timed out while waiting for a reply -

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i have small application uses wcf communicate webserver. program used 200 clients, , each client sending in 5-20 requests/min.

looking @ error logs get:

the request channel timed out while waiting reply after 00:00:59.9989999

the requests made follows:

clientservice client = new clientservice(); client.open(); client.updateonline(userid); client.close();

this app.config

<configuration> <configsections> </configsections> <startup><supportedruntime version="v2.0.50727"/></startup><system.servicemodel>     <bindings>         <wshttpbinding>             <binding name="wshttpbinding_iclientservice" closetimeout="00:01:00"                 opentimeout="00:01:00" receivetimeout="00:10:00" sendtimeout="00:01:00"                 bypassproxyonlocal="false" transactionflow="false" hostnamecomparisonmode="strongwildcard"                 maxbufferpoolsize="524288" maxreceivedmessagesize="65536"                 messageencoding="text" textencoding="utf-8" usedefaultwebproxy="true"                 allowcookies="false">                 <readerquotas maxdepth="32" maxstringcontentlength="8192" maxarraylength="16384"                     maxbytesperread="4096" maxnametablecharcount="16384" />                 <reliablesession ordered="true" inactivitytimeout="00:10:00"                     enabled="false" />                 <security mode="none">                     <transport clientcredentialtype="windows" proxycredentialtype="none"                         realm="" />                     <message clientcredentialtype="windows" negotiateservicecredential="true" />                 </security>             </binding>         </wshttpbinding>     </bindings>     <client>         <endpoint address="path service"             binding="wshttpbinding" bindingconfiguration="wshttpbinding_iclientservice"             contract="iclientservice" name="wshttpbinding_iclientservice">             <identity>                 <dns value="localhost" />             </identity>         </endpoint>     </client> </system.servicemodel>

of "many calls" each day 200-800 fail. , n-1 ok. confused issue can be. looking @ server stats, it's hardly building sweat - each request takes <2 sec process. data it's sending consists of "int" or "very small strings" - so, not due size, if - there should consistent failure..

suggestions?

it seems requests queuing on server before being handled , starts time out. can try couple of things here see whats going on

1) try throttling in wcf services e.g: try increasing concurrent sessions. take wcf throttling

2) try using percall rather using sessions here make sure no session remains there. here can on interface remove session

[servicecontract(namespace="your namespace", sessionmode=sessionmode.notallowed)]

and contract classes implementing interface

servicebehavior(instancecontextmode = instancecontextmode.percall)]

and .... should enable tracing see whats going on .


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