[PR #6019] [client] Use ctx.Err() instead of gRPC codes.Canceled to detect shutdown #28918

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saavagebueno · 2026-08-05T08:07:09-04:00

saavagebueno commented

2026-08-05 08:07:09 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/6019

State: closed
Merged: Yes

Detecting shutdown by inspecting the gRPC status code conflates a local context cancellation with a server- or proxy-sent codes.Canceled. When the latter occurs (e.g. an intermediary proxy resets the stream), the retry loop silently terminates and the client never reconnects.

Switch to ctx.Err() in the signal Receive loop and management Sync/Job handlers, and stop matching gRPC Canceled/DeadlineExceeded in the flow client's isContextDone helper. With this change, a server-sent Canceled is treated as a transient error and the backoff retry loop continues.

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Summary by CodeRabbit

Release Notes

Bug Fixes
- Improved context cancellation handling across client components when retrying failed operations.
- Refined error detection to prioritize local context state over remote gRPC status codes.
- Enhanced shutdown behavior when operations are canceled or exceed deadlines.
Refactor
- Simplified error handling logic in network stream management.

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/6019 **State:** closed **Merged:** Yes --- Detecting shutdown by inspecting the gRPC status code conflates a local context cancellation with a server- or proxy-sent codes.Canceled. When the latter occurs (e.g. an intermediary proxy resets the stream), the retry loop silently terminates and the client never reconnects. Switch to ctx.Err() in the signal Receive loop and management Sync/Job handlers, and stop matching gRPC Canceled/DeadlineExceeded in the flow client's isContextDone helper. With this change, a server-sent Canceled is treated as a transient error and the backoff retry loop continues. ## Describe your changes ## Issue ticket number and link ## Stack  ### Checklist - [x] Is it a bug fix - [ ] Is a typo/documentation fix - [ ] Is a feature enhancement - [ ] It is a refactor - [ ] Created tests that fail without the change (if possible) > By submitting this pull request, you confirm that you have read and agree to the terms of the [Contributor License Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md). ## Documentation Select exactly one: - [ ] I added/updated documentation for this change - [x] Documentation is **not needed** for this change (explain why) ### Docs PR URL (required if "docs added" is checked) Paste the PR link from https://github.com/netbirdio/docs here: https://github.com/netbirdio/docs/pull/__  ## Summary by CodeRabbit ## Release Notes * **Bug Fixes** * Improved context cancellation handling across client components when retrying failed operations. * Refined error detection to prioritize local context state over remote gRPC status codes. * Enhanced shutdown behavior when operations are canceled or exceed deadlines. * **Refactor** * Simplified error handling logic in network stream management.

saavagebueno added the pull-request label 2026-08-05 08:07:09 -04:00

saavagebueno closed this issue

2026-08-05 08:07:09 -04:00

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Reference: DYNR/netbird#28918