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Showing posts tagged “think time”

Load Testing Back to Basics: Avoiding the KeepAliveTimeout Race Condition

You’ve recorded your test case, configured your datasets, and run your replays.  You start up the load test and … you see numerous errors like this:
“The connection with the server was unexpectedly closed before starting the response.”
What’s going on?  Well, one common reason for this error is a connection-related race condition between Load Tester and the web server due to the server’s configured persistent connection timeout.
Persistent connections are an HTTP mechanism for minimizing network connection overhead between the browser and the web server.  If the client has the Connection request header set to Keep-Alive, and the server responds with the … Continue reading »

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