Fix flaky pauseless ingestion integration tests

[xiangfu0]

Summary

• Scope the 10-second segment-completion deadline to the controller failure-injection tests that require it.
• Configure the short deadline only after the non-pauseless comparison table finishes setup.
• Keep the short deadline through the explicit validation repair pass, then restore the normal 5-minute deadline.

Root cause

BasePauselessRealtimeIngestionTest globally replaced the controller segment-completion deadline with 10 seconds. That affected ordinary pauseless tests, table rebalance tests, and the non-pauseless comparison table even when no controller fault was injected. On a busy CI runner, normal segment commits exceeded the artificial deadline and were repeatedly repaired, causing otherwise unrelated tests to hit their 20-minute timeout.

How to reproduce

Run the Set 2 integration-test shard containing the pauseless suites under CI load. In the failing job, the basic pauseless test logged 38 segment-completion deadline expirations, the rebalance test logged 14, and the ideal-state failure test logged 2 before five tests timed out. The passing run on the same branch and a passing master run logged no such expirations for those classes.

Testing

• JDK 25 focused reactor run: ./mvnw -pl pinot-integration-tests -am -Dtest=PauselessRealtimeIngestionIntegrationTest,TableRebalancePauselessIntegrationTest,PauselessRealtimeIngestionIdealStateUpdateFailureTest,PauselessRealtimeIngestionNewSegmentMetadataCreationFailureTest,PauselessRealtimeIngestionCommitEndMetadataFailureTest -Dsurefire.failIfNoSpecifiedTests=false test (6 tests, 0 failures)
• ./mvnw spotless:apply -pl pinot-integration-tests
• ./mvnw license:format -pl pinot-integration-tests
• ./mvnw checkstyle:check -pl pinot-integration-tests
• ./mvnw license:check -pl pinot-integration-tests
• JDK 25 warning-enabled reactor test-compile with -Xlint:all

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.60%. Comparing base (d3604a5) to head (46914b3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #19133      +/-   ##
============================================
- Coverage     66.62%   66.60%   -0.02%     
+ Complexity     1423     1417       -6     
============================================
  Files          3443     3443              
  Lines        218577   218574       -3     
  Branches      34792    34791       -1     
============================================
- Hits         145624   145584      -40     
- Misses        61218    61254      +36     
- Partials      11735    11736       +1     

Flag	Coverage Δ
custom-integration1	?
integration	?
integration1	?
integration2	?
java-25	66.60% <ø> (-0.02%)	⬇️
temurin	66.60% <ø> (-0.02%)	⬇️
unittests	66.60% <ø> (-0.02%)	⬇️
unittests1	57.11% <ø> (-0.02%)	⬇️
unittests2	38.93% <ø> (-0.01%)	⬇️

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[Copilot]

Pull request overview

This PR reduces flakiness in pauseless real-time ingestion integration tests by scoping the controller’s “max segment completion” timeout override (10s) to only the failure-injection scenarios, preventing normal pauseless and comparison-table ingestion from being forced into repeated deadline-expiry repairs on busy CI runners.

Changes:

• Apply the 10-second segment-completion timeout only when a failure point is configured (i.e., failure-injection tests).
• Delay applying the short timeout until after the non-pauseless comparison table has completed setup.
• Keep the short timeout through the validation/repair pass, then restore the default 5-minute timeout via a finally block.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.

Suppressed comments (1)

pinot-integration-tests/src/test/java/org/apache/pinot/integration/tests/BasePauselessRealtimeIngestionTest.java:169

• getFailurePoint() is now explicitly nullable, but injectFailure() / disableFailure() still call enableTestFault(getFailurePoint()) / disableTestFault(getFailurePoint()) and set _failureEnabled even when the failure point is null (e.g. TableRebalancePauselessIntegrationTest). This leaves a null key in the failure-config map and can also flip _failureEnabled to true even though no failure is injected, which can change expectations such as getCountStarResult() in future subclasses. Consider treating null as "no failure" in these helpers.

  protected void injectFailure() {
    PinotLLCRealtimeSegmentManager realtimeSegmentManager = _helixResourceManager.getRealtimeSegmentManager();
    if (realtimeSegmentManager instanceof FailureInjectingPinotLLCRealtimeSegmentManager) {
      ((FailureInjectingPinotLLCRealtimeSegmentManager) realtimeSegmentManager).enableTestFault(getFailurePoint());
    }
    _failureEnabled = true;

[xiangfu0]

Addressed the suppressed review comment on BasePauselessRealtimeIngestionTest: injectFailure() and disableFailure() now return early when getFailurePoint() is null, so no null key is put into the failure-config map and _failureEnabled no longer flips to true for tests that inject no failure (TableRebalancePauselessIntegrationTest). No behavior change today — that class's getCountStarResultWithFailure() already returns DEFAULT_COUNT_STAR_RESULT — but it removes the latent trap for future subclasses. Verified with TableRebalancePauselessIntegrationTest, PauselessRealtimeIngestionIntegrationTest, and the three controller-failure tests (6 tests, 0 failures on JDK 25).

🤖 Addressed by Claude Code