exporter: fix flaky Test_rateLimitExport with polling #4280
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Replace fixed sleep with polling-based synchronization to eliminate timing-dependent race condition that caused intermittent test failures. The test was using a fixed 200ms sleep which created a window where multiple ticker intervals could fire, causing off-by-one errors in event counts. The new approach polls every 10ms until expected events are received, with a 500ms timeout for robustness. Fixes cilium#2789 Signed-off-by: Farooq Shaikh <[email protected]>
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This PR fixes a flaky test with no user-facing changes. Could a maintainer please add the |
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Nov 21, 2025
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lgtm as well, only a few golang nits. Will merge this later, give you some time to update the patch or not depending on what you prefer! thanks
Co-authored-by: Mahé <[email protected]> Signed-off-by: Farooq Shaikh <[email protected]>
Co-authored-by: Mahé <[email protected]> Signed-off-by: Farooq Shaikh <[email protected]>
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Sorry for the late reply. Was on vacation. Have incorporated your suggestions 🙂 |
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Summary
This PR fixes the flaky Test_rateLimitExport test by replacing the fixed sleep duration with a polling-based synchronization mechanism, addressing the timing race condition reported in #2789.
Related Issue
Fixes #2789
Root Cause
The test used a fixed 200ms sleep which allowed multiple rate limiter ticker intervals (50ms each) to fire during the wait period. This created a timing window where:
Proposed Changes
Testing Performed
Backward Compatibility
No breaking changes. The fix only modifies the test implementation, not the rate limiter functionality itself.
Changelog