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High non-200 response codes generated by your application server

Learn how to avoid flaky tests due to a high number of non-200 response codes.

Issue

When you run a test using BrowserStack Automate, the following warning might appear on the Issues Detected tab in the Automate dashboard:

More than 10% URLs received non-200

Cause

Typically, non-200 responses are returned by an application server under test when the requested resources are not available. The browsers at the BrowserStack devices communicate with your application server. However, if these browsers are not able to access the resources, then non-200 response codes might be returned by your application server.

Some other causes for this warning are:

  • Your application server might be operating under heavy load.
  • Your applications server might be fetching resources from some third-party services that might be temporarily unavailable.

Why you must mitigate this issue

As an organization, optimizing your builds to run faster, is crucial. BrowserStack understands the need to identify issues that might not be evident, but have a large impact on the speed and stability of your test sessions.

Use the resolutions provided to mitigate these issues so as to:

  • Improve performance
  • Reduce test flakiness

Resolution/Workaround

You can try the following options to debug the warning:

  • Check the Network Logs tab for your session in the Automate dashboard.
  • Add better exception handling in your test script.
  • Add retry logic to fetch resources from your application server in your test script.

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