out_kafka: preserve infinite shutdown grace - #12345
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Thread-safe hot reload uses non-positive timeout sentinels. Convert only positive grace periods from seconds to milliseconds so librdkafka still receives its no-wait and infinite values unchanged. Signed-off-by: Antonio Santos <antonio@santosvelasco.com>
Use an unavailable broker to keep one Kafka message pending during hot reload. Verify infinite grace waits for librdkafka to resolve the message while finite grace remains bounded. Signed-off-by: Antonio Santos <antonio@santosvelasco.com>
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Included review availability: Your plan provides up to 8 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe Kafka output now preserves librdkafka’s zero and infinite timeout sentinels. New integration tests cover finite and infinite shutdown grace behavior during hot reload. ChangesKafka shutdown grace handling
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The Kafka shutdown fix now preserves the infinite grace sentinel, but a failed thread-safe hot reload can leave the running instance with that setting. If Kafka delivery remains pending, a later shutdown or recovery action may wait indefinitely, so rollback restoration or explicit owner acceptance is needed before merge. Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant Test as Integration test
participant FluentBit as Fluent Bit
participant Kafka as Kafka output
participant Reload as Hot reload
Test->>FluentBit: Submit pending-delivery record
FluentBit->>Kafka: Enqueue record
Test->>Reload: Trigger hot reload
Reload->>Kafka: Force flush pending delivery
Kafka-->>Reload: Return completion or timeout
Reload-->>Test: Report reload result
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The changes satisfy issue
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@tests/integration/scenarios/out_kafka/tests/test_out_kafka_001.py`:
- Around line 628-641: Update the reload timing assertions around
trigger_http_reload and _wait_for_log_text to record a monotonic timestamp
immediately before triggering reload, then assert the force-flush timeout log
appears only after a lower bound near the configured 2000 ms grace interval.
Preserve the existing ordering assertion that the timeout precedes "[reload]
start everything".
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plugins/out_kafka/kafka.ctests/integration/scenarios/out_kafka/config/out_kafka_shutdown_grace.yamltests/integration/scenarios/out_kafka/tests/test_out_kafka_001.py
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Require the finite-grace reload to wait near its configured two-second bound so the test distinguishes seconds from milliseconds. Signed-off-by: Antonio Santos <antonio@santosvelasco.com>
cosmo0920
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I added several comments. So, could you take a look?
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The patch looks reasonable for me.
Need to investigate why the warning of commit body is exceeded more than 80 characters is caused.
@cosmo0920 turns out that the PR description first three paragraphs are 210, 262, and 154 characters. Could it be that the automation is looking at that too? |
3 participants
Preserve Fluent Bit's no-wait and infinite grace values when converting the Kafka shutdown timeout from seconds to milliseconds. Positive grace values continue to be converted before calling
rd_kafka_flush().Thread-safe hot reload sets the old context's grace to
-1. The Kafka output previously multiplied that sentinel by 1000 and passed-1000to librdkafka, which treated it as an expired timeout and returned before outstanding messages reached a delivery result.The integration coverage keeps a Kafka message pending with an unavailable broker and exercises both infinite and finite grace behavior during hot reload.
This patch was developed with AI assistance.
Fixes #12343
Summary by CodeRabbit
Bug Fixes
Tests