Rebase commits now created using the merge-ort strategy

Last year, we made merging pull requests much faster by using the merge-ort strategy. Now, rebase commits get the same merge-ort treatment. This results in significantly improved speed: the P99 (the average time to complete rebases excluding the 1% slowest outliers) used to take around 3.6 seconds. P99 with the new strategy is 0.35 seconds. Because of the speedup, the fraction of PR rebases which fail due to timeouts dropped from 1.3% to 0.14%.

Learn more about the Git merge-ort strategy and merge methods for pull requests.

GitHub Actions – Update on OIDC integration with AWS

We have received customers reporting errors with Actions’ OIDC integration with AWS.
This happens for customers who are pinned to a single intermediary thumbprint from the Certificate Authority (CA) of the Actions SSL certificate.

There are two possible intermediary certificates for the Actions SSL certificate and either can be returned by our servers, requiring customers to trust both. This is a known behavior when the intermediary certificates are cross-signed by the CA.

Customers experiencing issues authenticating via OIDC with AWS should configure both thumbprints to be trusted in the AWS portal.
The two known intermediary thumbprints at this time are:

  • 6938fd4d98bab03faadb97b34396831e3780aea1
  • 1c58a3a8518e8759bf075b76b750d4f2df264fcd

Learn more about using OIDC with GitHub Actions.

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