I have this error in ASP.NET application , NET 4.7.1.
The request queue limit of the session is exceeded.
System.Web.HttpException (0x80004005): The request queue limit of the session is exceeded. at System.Web.SessionState.SessionStateModule.QueueRef() at System.Web.SessionState.SessionStateModule.PollLockedSession() at System.Web.SessionState.SessionStateModule.GetSessionStateItem() at System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData)
any suggestions ?
The default behavior has changed in .NET 4.7. Retargeting guide suggests:
To restore the old behavior, you can add the following setting to your web.config file to opt-out of the new behavior.
<appSettings> <add key="aspnet:RequestQueueLimitPerSession" value="2147483647"/> </appSettings>
Clarification of changed behavior:
In the .NET Framework 4.6.2 and earlier, ASP.NET executes requests with the same Sessionid sequentially and ASP.NET always issues the Sessionid through cookies by default. If a page takes a long time to respond, it will significantly degrade server performance just by pressing F5 on the browser. In the fix, we added a counter to track the queued requests and terminate the requests when they exceed a specified limit. The default value is 50. If the limit is reached, a warning will be logged in the event log, and an HTTP 500 response may be recorded in the IIS log.
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