CDRIVER-6274 finalize client backpressure phase 1 rollout#2269
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connorsmacd merged 19 commits intomongodb:masterfrom Apr 15, 2026
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connorsmacd
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Apr 13, 2026
kevinAlbs
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Changes look good with an added check for URI value of 0.
The Evergreen task failures look unrelated to these changes. The "Incorrect shasum256" on Windows 7.0 tasks is reported on SERVER-124033.
eramongodb
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Minor suggestion; otherwise, LGTM.
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CDRIVER-6274
DRIVERS-3427
Summary
This PR implement phase 1 Client Backpressure spec changes per DRIVERS-3427:
adaptiveRetriesURI option and token bucket. While the token bucket may be resurrected in the future, this is not a guarantee, so I removed it completely.maxAdaptiveRetriesURI option (non-negative integer, default2) to configure the maximum number of retries for operations that fail with aSystemOverloadedError.enableOverloadRetargetingURI option (boolean, defaultfalse) to control whether the driver deprioritizes a server that returns aSystemOverloadedErrorwhen selecting a server for retry.