Client Backpressure

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    • Client Backpressure Python
    • Python Drivers
    • Needed
    • Hide
      1. What would you like to communicate to the user about this feature?
      See: https://github.com/mongodb/mongo-python-driver/blob/master/doc/changelog.rst#changes-in-version-4170-20260420 changelog and check bullet point on IWM
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      Those should already be provided and linked in docs
      3. Which versions of the driver/connector does this apply to?
      4.17.0
      Show
      1. What would you like to communicate to the user about this feature? See: https://github.com/mongodb/mongo-python-driver/blob/master/doc/changelog.rst#changes-in-version-4170-20260420 changelog and check bullet point on IWM 2. Would you like the user to see examples of the syntax and/or executable code and its output? Those should already be provided and linked in docs 3. Which versions of the driver/connector does this apply to? 4.17.0
    • Done
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    • 🔵 Done
    • Hide

      Engineer(s): Noah Stapp, Iris Ho

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

      Show
      Engineer(s): Noah Stapp, Iris Ho What was accomplished since the last update? Server de-prioritization PYTHON-5731 ( DRIVERS-3404 ) merged What's the focus over the next two weeks? PYTHON-5528 ( DRIVERS-3239 ) implementation    Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239
    • Hide

      2026-04-17 - 🔵 Done
      Engineer(s): Noah Stapp, Iris Ho

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

      • Awaiting Spec review & approval on DRIVERS-3239

        2026-04-10 - 🟢 On Track
        Engineer(s): Noah Stapp, Iris Ho

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

      • Awaiting Spec review & approval on DRIVERS-3239

        2026-04-09 - 🟡 Potential Risk
        Engineer(s): Noah Stapp, Iris Ho

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

      • Awaiting Spec review & approval on DRIVERS-3239

        2026-02-27 - 🟡 Potential Risk
        Engineer(s): Noah Stapp, Iris Ho

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

       

      2026-01-30 - 🟢 On Track
      Engineer(s): Iris Ho, Steve Silvester, Noah Stapp

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

       

      2026-01-20 - 🟢 On Track
      Engineer(s): Iris Ho, Steve Silvester, Noah Stapp

      What was accomplished since the last update?

      What's the focus over the next two weeks?

       

      Any risks/blockers/impediments?

       

      2025-12-19 - 🟢 On Track
      Engineer(s): Iris Ho, Steve Silvester, Noah Stapp

      What was accomplished since the last update?

      • DRIVERS-3239 (PYTHON-5528) - Add exponential backoff to operation retry loop for server overloaded errors
      • Continued to review in-progress specs PR and implement tests in Python. Updated transactions spec and added unified tests. Waiting for final specification approval before merging the Python PR.
      • DRIVERS-3344 (PYTHON-5662) Add support for server selection's deprioritized servers to all topologies
      • Specifications and Python implementation merged.

      What's the focus over the next two weeks?

      Any risks/blockers/impediments?

      • N/A

      2025-12-05 - 🟢 On Track
      Engineer(s): Iris Ho, Steve Silvester, Noah Stapp

      What was accomplished since the last update?

      • DRIVERS-3239 (PYTHON-5528) - Add exponential backoff to operation retry loop for server overloaded errors
        • Reviewed in-progress specs PR and implemented tests in Python. Waiting for final specification approval before merging the Python PR.
      • PYTHON-5651 - Deprioritize previous servers for overload retry attempts
        • Implemented along with PYTHON-5528 to test against unified and prose tests

      What's the focus over the next two weeks?

      Any risks/blockers/impediments?

      • N/A

      2025-11-25 - 🟢 On Track
      Engineer(s): Shane Harvey, Iris Ho, Steve Silvester

      What was accomplished since the last update?

      • What's the focus over the next two weeks?
        • Implementing DRIVERS-3217 once the specifications PR is available

      Any risks/blockers/impediments?

      • N/A

      2025-11-12 - 🟢 On Track
      Engineer(s): Shane Harvey, Iris Ho, Steve Silvester

      What was accomplished since the last update?

       

      • PYTHON-5562 investigate default values for withTransaction backoff parameters
        • Work is finished. Investigation done and findings presented to the larger DBX team at dbx offsite
      • PYTHON-5518 withTransaction API retries too frequently
        • Made a breakthrough on consistent test reproduction for withTransaction retry, convened on leveraging a "jitter constant" for the sake of maintaining determinism in tests. Confirmed feasibility across drivers teams and updated the spec and tests to reflect this.
      • PYTHON-5536 --> PYTHON 5517
        • Availability Workload (PERF-7078) merged
        • Python implementation currently under review PYTHON-5517
        • Spec PR in review (in sync with python implementation) DRIVERS-3218
      • What's the focus over the next two weeks?
        • Merging the Specifications PRs
        • Merging the implementations derivate of those Specification PRs

      Any risks/blockers/impediments?

      • N/A
            • 2025-11-12 - 🟢 On Track
              Engineer(s): Shane Harvey, Iris Ho, Steve Silvester

       

      What was accomplished since the last update?

       

      • PYTHON-5562 investigate default values for withTransaction backoff parameters
        • Work is finished. Investigation done and findings presented to the larger DBX team at dbx offsite
      • PYTHON-5518 withTransaction API retries too frequently
        • Made a breakthrough on consistent test reproduction for withTransaction retry, convened on leveraging a "jitter constant" for the sake of maintaining determinism in tests. Confirmed feasibility across drivers teams and updated the spec and tests to reflect this.
      • PYTHON-5536 --> PYTHON 5517
        • Availability Workload (PERF-7078) merged
        • Python implementation currently under review PYTHON-5517
        • Spec PR in review (in sync with python implementation) DRIVERS-3218
      • What's the focus over the next two weeks?
        • Merging the Specifications PRs
        • Merging the implementations derivate of those Specification PRs

      Any risks/blockers/impediments?

      • N/A
      Show
      2026-04-17 - 🔵 Done Engineer(s): Noah Stapp, Iris Ho What was accomplished since the last update? Server de-prioritization PYTHON-5731 ( DRIVERS-3404 ) merged What's the focus over the next two weeks? PYTHON-5528 ( DRIVERS-3239 ) implementation    Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239 2026-04-10 - 🟢 On Track Engineer(s): Noah Stapp, Iris Ho What was accomplished since the last update? Server de-prioritization PYTHON-5731 ( DRIVERS-3404 ) merged What's the focus over the next two weeks? PYTHON-5528 ( DRIVERS-3239 ) implementation    Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239 2026-04-09 - 🟡 Potential Risk Engineer(s): Noah Stapp, Iris Ho What was accomplished since the last update? Server de-prioritization PYTHON-5731 ( DRIVERS-3404 ) merged What's the focus over the next two weeks? PYTHON-5528 ( DRIVERS-3239 ) implementation    Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239 2026-02-27 - 🟡 Potential Risk Engineer(s): Noah Stapp, Iris Ho What was accomplished since the last update? Server de-prioritization PYTHON-5731 ( DRIVERS-3404 ) merged What's the focus over the next two weeks? PYTHON-5528 ( DRIVERS-3239 ) implementation    Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239   2026-01-30 - 🟢 On Track Engineer(s): Iris Ho, Steve Silvester, Noah Stapp What was accomplished since the last update? PYTHON-5689 ( DRIVERS-3364 ) – Fix Retry Backoff is Enforced prose test in review What's the focus over the next two weeks? Merge PR for PYTHON-5528 Merge into mainline PyMongo PYTHON-5668   Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239   2026-01-20 - 🟢 On Track Engineer(s): Iris Ho, Steve Silvester, Noah Stapp What was accomplished since the last update? DRIVERS-3239 ( PYTHON-5528 ) - Add exponential backoff to operation retry loop for server overloaded errors PYTHON-5651 - Deprioritize previous servers for overload retry attempts in review DRIVERS-3355 ( PYTHON-5675 ) - Fix racy backpressure tests generally merged DRIVERS-3367 ( PYTHON-5696 ) Fix racy backpressure-network-* tests still in code review What's the focus over the next two weeks? Merge PR for PYTHON-5528 Merge into mainline PyMongo PYTHON-5668   Any risks/blockers/impediments? Awaiting Spec review & approval on DRIVERS-3239   2025-12-19 - 🟢 On Track Engineer(s): Iris Ho, Steve Silvester, Noah Stapp What was accomplished since the last update? DRIVERS-3239 ( PYTHON-5528 ) - Add exponential backoff to operation retry loop for server overloaded errors Continued to review in-progress specs PR and implement tests in Python. Updated transactions spec and added unified tests. Waiting for final specification approval before merging the Python PR. DRIVERS-3344 ( PYTHON-5662 ) Add support for server selection's deprioritized servers to all topologies Specifications and Python implementation merged. What's the focus over the next two weeks? Merge PR for PYTHON-5528 Any risks/blockers/impediments? N/A 2025-12-05 - 🟢 On Track Engineer(s): Iris Ho, Steve Silvester, Noah Stapp What was accomplished since the last update? DRIVERS-3239 ( PYTHON-5528 ) - Add exponential backoff to operation retry loop for server overloaded errors Reviewed in-progress specs PR and implemented tests in Python. Waiting for final specification approval before merging the Python PR. PYTHON-5651 - Deprioritize previous servers for overload retry attempts Implemented along with PYTHON-5528 to test against unified and prose tests DRIVERS-3218 ( PYTHON-5517 ) Specification and Python implementation merged. DRIVERS-1934 ( PYTHON-5518 ) Specifications and Python implementation merged. What's the focus over the next two weeks? DRIVERS-3344 ( PYTHON-5662 ) - specifications and PyMongo implementation Merge PR for PYTHON-5528 and PYTHON-5651 Any risks/blockers/impediments? N/A 2025-11-25 - 🟢 On Track Engineer(s): Shane Harvey, Iris Ho, Steve Silvester What was accomplished since the last update? DRIVERS-3218 ( PYTHON-5517 ) Implementations complete, awaiting specifications PR in final review. DRIVERS-1934 ( PYTHON-5518 ) Implementations complete, awaiting specifications PR in final review. What's the focus over the next two weeks? Implementing DRIVERS-3217 once the specifications PR is available Any risks/blockers/impediments? N/A 2025-11-12 - 🟢 On Track Engineer(s): Shane Harvey, Iris Ho, Steve Silvester What was accomplished since the last update?   PYTHON-5562 investigate default values for withTransaction backoff parameters Work is finished. Investigation done and findings presented to the larger DBX team at dbx offsite PYTHON-5518 withTransaction API retries too frequently Made a breakthrough on consistent test reproduction for withTransaction retry, convened on leveraging a "jitter constant" for the sake of maintaining determinism in tests. Confirmed feasibility across drivers teams and updated the spec and tests to reflect this. PYTHON-5536 --> PYTHON 5517 Availability Workload (PERF-7078) merged Python implementation currently under review PYTHON-5517 Spec PR in review (in sync with python implementation) DRIVERS-3218 What's the focus over the next two weeks? Merging the Specifications PRs Merging the implementations derivate of those Specification PRs Any risks/blockers/impediments? N/A 2025-11-12 - 🟢 On Track Engineer(s): Shane Harvey, Iris Ho, Steve Silvester   What was accomplished since the last update?   PYTHON-5562 investigate default values for withTransaction backoff parameters Work is finished. Investigation done and findings presented to the larger DBX team at dbx offsite PYTHON-5518 withTransaction API retries too frequently Made a breakthrough on consistent test reproduction for withTransaction retry, convened on leveraging a "jitter constant" for the sake of maintaining determinism in tests. Confirmed feasibility across drivers teams and updated the spec and tests to reflect this. PYTHON-5536 --> PYTHON 5517 Availability Workload (PERF-7078) merged Python implementation currently under review PYTHON-5517 Spec PR in review (in sync with python implementation) DRIVERS-3218 What's the focus over the next two weeks? Merging the Specifications PRs Merging the implementations derivate of those Specification PRs Any risks/blockers/impediments? N/A
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      Summary of necessary driver changes

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      Commits for syncing spec/prose tests
      (and/or refer to an existing language POC if needed)

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      Context for other referenced/linked tickets

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      Show
      Summary of necessary driver changes   Commits for syncing spec/prose tests (and/or refer to an existing language POC if needed)   Context for other referenced/linked tickets  
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      This ticket was split from DRIVERS-3160, please see that ticket for a detailed description.

            Assignee:
            Noah Stapp
            Reporter:
            TPM Jira Automations Bot
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              Created:
              Updated:
              Resolved:
              34 weeks, 3 days
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