Python 2.7 has reached end of support and will be
deprecated on January 31, 2026. After deprecation, you won't be able to deploy Python 2.7 applications, even if your organization previously used an organization policy to re-enable deployments of legacy runtimes. Your existing Python 2.7 applications will continue to run and receive traffic after their
deprecation date. We recommend that you
migrate to the latest supported version of Python.
App Engine error rates
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The Error Rate for the SLA is defined in the following table. Capitalized terms not defined herein have the meaning set forth in the Agreement. New components may be added to this page with their respective errors. Any changes will be made in accordance with the Agreement.
| Component | Error | Total calls | Date added |
| Serving Infrastructure | HTTP Request sent to App Engine that results in an INTERNAL_SERVING_ERROR | The total number of HTTP requests sent to App Engine | Oct 10, 2011 |
| Search | Search API search call returning one of the following errors: TRANSIENT_ERROR, INTERNAL_ERROR | The total number of Search API calls | Aug 27, 2013 |
To diagnose and resolve SLA error rate issues, see
Troubleshoot App Engine errors.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-10-02 UTC.
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