Multiple concurrent WCF calls from single client to Service

Question

I have a service that calls a service on another machine and the most number of concurrent connections I can get is 2. I have tried changing the throttling on the WCF Service Behaviour but to no effect. I have read that it is because of the HTTP limit of 2 concurrent connections from a client machine to a server. How do I overcome this? The os on both machines is server 2003.

Config:

<serviceBehaviors>
    <behavior name="MyServiceTypeBehaviors">
      <serviceMetadata httpGetEnabled="true" />
      <serviceThrottling maxConcurrentCalls="100" maxConcurrentInstances="100" maxConcurrentSessions="100"/>
    </behavior>
  </serviceBehaviors>

<system.net>
<connectionManagement>
  <add address="*" maxconnection="100" />
</connectionManagement>

score 35 · Accepted Answer · answered Sep 28 '10 at 18:20

35

You have to overcome this from client code (from the service which calls other service). Use this code in the initialization of your service application to increase connections:

System.Net.ServicePointManager.DefaultConnectionLimit = 10;

answered Sep 28 '10 at 18:20

Ladislav Mrnka

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It solved for me, after i tested outside the unit test. – MiguelSlv Apr 03 '19 at 14:51

score 10 · Answer 2 · answered Sep 28 '10 at 16:51

10

Try adding something like this in your app.config on your client app:

<system.net>
    <connectionManagement>
        <add address="*" maxconnection="100" />
    </connectionManagement>
</system.net>

answered Sep 28 '10 at 16:51

TheNextman

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Will there be any impact on the application after adding this configuration? – Himanshu Jain Sep 19 '16 at 05:58
@HimanshuJain https://stackoverflow.com/questions/34922699/disadvantage-of-increasing-servicepointmanager-defaultconnectionlimit – Kmaczek Feb 04 '20 at 15:16

Multiple concurrent WCF calls from single client to Service

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