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Fix scheduler event loop being stuck due to task with Priority.idle #151168

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merged 5 commits into from
Jul 2, 2024

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lauweijie
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handleEventLoopCallback() should return true rather than false when there are tasks in the queue but the highest priority task is not run because of the schedulingStrategy. If false is returned when the queue still has tasks, the event loop stops, causing existing and new tasks to never be scheduled.

For full context, see #73766 (comment).

Fixes #73766 and #82016.

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  • I listed at least one issue that this PR fixes in the description above.
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@github-actions github-actions bot added the framework flutter/packages/flutter repository. See also f: labels. label Jul 2, 2024
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@goderbauer goderbauer left a comment

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Excellent analysis!

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@goderbauer goderbauer left a comment

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LGTM

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@Piinks Piinks left a comment

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LGTM, thank you for the fix!

@Piinks Piinks added the autosubmit Merge PR when tree becomes green via auto submit App label Jul 2, 2024
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auto-submit bot commented Jul 2, 2024

auto label is removed for flutter/flutter/151168, due to - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

@auto-submit auto-submit bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Jul 2, 2024
@jiahaog jiahaog added the autosubmit Merge PR when tree becomes green via auto submit App label Jul 2, 2024
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jiahaog commented Jul 2, 2024

Thanks for the fix! I overwrote "Google testing" because it seems to have already passed internally but the status isn't reflected here.

@auto-submit auto-submit bot merged commit 5698944 into flutter:master Jul 2, 2024
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hello-coder-xu added a commit to hello-coder-xu/flutter that referenced this pull request Jul 3, 2024
* master: (88 commits)
  Fix scheduler event loop being stuck due to task with Priority.idle (flutter#151168)
  Fix result propagation in RenderSliverEdgeInsetsPadding.hitTestChildren (flutter#149825)
  docImports for flutter_test (flutter#151189)
  Interactable ScrollView content when settling a scroll activity (flutter#145848)
  [flutter_tools] Update the mapping for the Dart SDK internal URI (flutter#151170)
  Roll pub packages (flutter#151129)
  Fix typo (flutter#151192)
  [tool] Fix `stdin.flush` calls on processes started by `FakeProcessManager` (flutter#151183)
  Roll Flutter Engine from 433d360eee11 to 44278941443e (4 revisions) (flutter#151186)
  Use `ErrorHandlingFileSystem.deleteIfExists` when deleting .plugin_symlinks (flutter#151073)
  ScrollEndNotification example: auto-scroll based on RenderSliver constraints and geometry (flutter#143538)
  Roll Packages from 412ec46 to d2705fb (13 revisions) (flutter#151169)
  docimports for painting (flutter#151143)
  docimports for scheduler (flutter#151126)
  `dismissible.dart` code cleanup (flutter#150276)
  docimports for physics (flutter#151125)
  docimports for services (flutter#151134)
  docimports for cupertino (flutter#151149)
  docimports for gestures (flutter#151123)
  Docimports for foundation (flutter#151119)
  ...
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 3, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 3, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 3, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 4, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 4, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 4, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 4, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 5, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jul 5, 2024
auto-submit bot pushed a commit to flutter/packages that referenced this pull request Jul 7, 2024
Roll Flutter from af913a7 to fafd67d34d68 (41 revisions)

flutter/flutter@af913a7...fafd67d

2024-07-05 [email protected] Roll Flutter Engine from 74d40c160e48 to 4ee09d3b7f3b (1 revision) (flutter/flutter#151346)
2024-07-05 [email protected] Roll Flutter Engine from ba9c7b6336ef to 74d40c160e48 (1 revision) (flutter/flutter#151340)
2024-07-05 [email protected] Roll Flutter Engine from 1f0f950ea02a to ba9c7b6336ef (1 revision) (flutter/flutter#151331)
2024-07-05 [email protected] Roll Flutter Engine from 3c6a373bda3e to 1f0f950ea02a (1 revision) (flutter/flutter#151326)
2024-07-04 [email protected] Roll Flutter Engine from 79a91e38c587 to 3c6a373bda3e (2 revisions) (flutter/flutter#151318)
2024-07-04 [email protected] Roll Packages from d2705fb to 754de19 (3 revisions) (flutter/flutter#151315)
2024-07-04 [email protected] Roll Flutter Engine from 2b6bb516e7e6 to 79a91e38c587 (2 revisions) (flutter/flutter#151314)
2024-07-04 [email protected] Roll Flutter Engine from 8e2d05fa95d7 to 2b6bb516e7e6 (2 revisions) (flutter/flutter#151299)
2024-07-04 [email protected] Roll Flutter Engine from 4190543cb093 to 8e2d05fa95d7 (13 revisions) (flutter/flutter#151293)
2024-07-03 137456488 [email protected] Roll pub packages (flutter/flutter#151203)
2024-07-03 [email protected] Fix invalid URL suggestion for gradle incompatability (flutter/flutter#150999)
2024-07-03 423393 [email protected] Cupertino transparent navigation bars (flutter/flutter#149102)
2024-07-03 1961493 [email protected] Prepares semantics_update_test for upcoming link URL change (flutter/flutter#151261)
2024-07-03 [email protected] Add a message about spam/brigading (flutter/flutter#150583)
2024-07-03 [email protected] PinnedHeaderSliver example based on the iOS Settings AppBar (flutter/flutter#151205)
2024-07-03 [email protected] Update deprecation policy (flutter/flutter#151257)
2024-07-03 [email protected] SliverFloatingHeader (flutter/flutter#151145)
2024-07-03 34871572 [email protected] Remove warning when KGP version not detected (flutter/flutter#151254)
2024-07-03 34465683 [email protected] Feat: Add withOpacity to gradient (flutter/flutter#150670)
2024-07-03 [email protected] Fix references in examples (flutter/flutter#151204)
2024-07-03 82763757 [email protected] Fix link in tree hygene doc (flutter/flutter#151235)
2024-07-03 [email protected] content dimensions are not established get controller value error (flutter/flutter#148938)
2024-07-03 [email protected] chore: fix typos and link broken (flutter/flutter#150402)
2024-07-03 [email protected] Add example of goldenFileComparator usage in widget tests (flutter/flutter#150422)
2024-07-03 [email protected] Fix project name fallback (flutter/flutter#150614)
2024-07-03 [email protected] Roll Flutter Engine from a3e61c0fd1c2 to 4190543cb093 (1 revision) (flutter/flutter#151241)
2024-07-03 [email protected] Roll Flutter Engine from 8274f54f11be to a3e61c0fd1c2 (2 revisions) (flutter/flutter#151237)
2024-07-03 [email protected] Force regeneration of platform-specific manifests before running performance tests (flutter/flutter#151003)
2024-07-03 [email protected] Handle a SocketException thrown when sending the browser close command to Chrome (flutter/flutter#151197)
2024-07-03 [email protected] Roll Flutter Engine from a02e3f673da3 to 8274f54f11be (4 revisions) (flutter/flutter#151226)
2024-07-03 [email protected] Roll Flutter Engine from c5c0c54d6d1d to a02e3f673da3 (1 revision) (flutter/flutter#151212)
2024-07-03 [email protected] Roll Flutter Engine from 44278941443e to c5c0c54d6d1d (9 revisions) (flutter/flutter#151208)
2024-07-02 [email protected] Fix scheduler event loop being stuck due to task with Priority.idle (flutter/flutter#151168)
2024-07-02 [email protected] Fix result propagation in RenderSliverEdgeInsetsPadding.hitTestChildren (flutter/flutter#149825)
2024-07-02 [email protected] docImports for flutter_test (flutter/flutter#151189)
2024-07-02 [email protected] Interactable ScrollView content when settling a scroll activity (flutter/flutter#145848)
2024-07-02 [email protected] [flutter_tools] Update the mapping for the Dart SDK internal URI (flutter/flutter#151170)
2024-07-02 137456488 [email protected] Roll pub packages (flutter/flutter#151129)
2024-07-02 36861262 [email protected] Fix typo (flutter/flutter#151192)
2024-07-02 [email protected] [tool] Fix `stdin.flush` calls on processes started by `FakeProcessManager` (flutter/flutter#151183)
2024-07-02 [email protected] Roll Flutter Engine from 433d360eee11 to 44278941443e (4 revisions) (flutter/flutter#151186)

If this roll has caused a breakage, revert this CL and stop the roller
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...
TahaTesser pushed a commit to TahaTesser/flutter that referenced this pull request Jul 8, 2024
…lutter#151168)

`handleEventLoopCallback()` should return `true` rather than `false` when there are tasks in the queue but the highest priority task is not run because of the `schedulingStrategy`. If `false` is returned when the queue still has tasks, the event loop stops, causing existing and new tasks to never be scheduled.

For full context, see flutter#73766 (comment).

Fixes flutter#73766 and flutter#82016.
victorsanni pushed a commit to victorsanni/flutter that referenced this pull request Jul 8, 2024
…lutter#151168)

`handleEventLoopCallback()` should return `true` rather than `false` when there are tasks in the queue but the highest priority task is not run because of the `schedulingStrategy`. If `false` is returned when the queue still has tasks, the event loop stops, causing existing and new tasks to never be scheduled.

For full context, see flutter#73766 (comment).

Fixes flutter#73766 and flutter#82016.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 6, 2024
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[SchedulerBinding] SchedulerBinding.instance.scheduleTask is jammed when Priority is idle
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