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[Java] Increase CallTest sleep durations to keep test from being flaky#39016

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scwhittle:flaky_test
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[Java] Increase CallTest sleep durations to keep test from being flaky#39016
scwhittle wants to merge 1 commit into
apache:masterfrom
scwhittle:flaky_test

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@scwhittle

@scwhittle scwhittle commented Jun 18, 2026

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While modifying the test, remove unnecessary throws declarations


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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request improves the reliability of the CallTest suite by extending timeout thresholds in simulated scenarios. Additionally, it cleans up the test code by removing redundant exception declarations that were not required by the implementation.

Highlights

  • Test Stability: Increased sleep durations in test timeout scenarios from one second to one minute to prevent flaky test failures.
  • Code Cleanup: Removed unnecessary 'throws UserCodeExecutionException' declarations from various test helper classes to simplify the test implementation.
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Code Review

This pull request cleans up the CallTest.java file by removing unnecessary throws UserCodeExecutionException declarations from several test helper classes. It also increases the timeout buffers for CallerExceedsTimeout, SetupExceedsTimeout, and TeardownExceedsTimeout from 1 second to 1 minute. The reviewer recommends reducing this timeout buffer to 5 seconds instead of a full minute to prevent the test suite from hanging or running extremely slowly during failures or regressions.

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CallerExceedsTimeout(Duration timeout) {
this.timeout = timeout.plus(Duration.standardSeconds(1L));
this.timeout = timeout.plus(Duration.standardMinutes(1L));

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medium

Increasing the sleep duration by a full minute can cause the test suite to hang or run extremely slowly if the timeout execution fails to interrupt properly or if there is a regression. A smaller buffer, such as 5 or 10 seconds, is typically sufficient to prevent flakiness on busy CI machines while keeping test failures fast.

Suggested change
this.timeout = timeout.plus(Duration.standardMinutes(1L));
this.timeout = timeout.plus(Duration.standardSeconds(5L));


private SetupExceedsTimeout(Duration timeout) {
this.timeout = timeout.plus(Duration.standardSeconds(1L));
this.timeout = timeout.plus(Duration.standardMinutes(1L));

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medium

Increasing the sleep duration by a full minute can cause the test suite to hang or run extremely slowly if the timeout execution fails to interrupt properly or if there is a regression. A smaller buffer, such as 5 or 10 seconds, is typically sufficient to prevent flakiness on busy CI machines while keeping test failures fast.

Suggested change
this.timeout = timeout.plus(Duration.standardMinutes(1L));
this.timeout = timeout.plus(Duration.standardSeconds(5L));


private TeardownExceedsTimeout(Duration timeout) {
this.timeout = timeout.plus(Duration.standardSeconds(1L));
this.timeout = timeout.plus(Duration.standardMinutes(1L));

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medium

Increasing the sleep duration by a full minute can cause the test suite to hang or run extremely slowly if the timeout execution fails to interrupt properly or if there is a regression. A smaller buffer, such as 5 or 10 seconds, is typically sufficient to prevent flakiness on busy CI machines while keeping test failures fast.

Suggested change
this.timeout = timeout.plus(Duration.standardMinutes(1L));
this.timeout = timeout.plus(Duration.standardSeconds(5L));

@scwhittle

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Example failure:
image

Seems likely to be just racy so adding more padding to the sleep

@scwhittle scwhittle force-pushed the flaky_test branch 2 times, most recently from defd589 to a2d9d7b Compare June 18, 2026 13:38
…o timeout not being observed.

Decrease configured timeouts from 1 minute to 1 second or 10 seconds to speed up test execution.
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Checks are failing. Will not request review until checks are succeeding. If you'd like to override that behavior, comment assign set of reviewers

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