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@bkonyi bkonyi commented Aug 6, 2025

It's possible (but unlikely) that two DDS instances can try and start at the same time (e.g., a "flutter run" is initiated while an existing "flutter attach" is waiting for a target to attach to). This can lead to DDS failing to initialize for one of the processes when the VM service disconnects it after the other process successfully invokes the "_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes #169265

bkonyi added 2 commits August 6, 2025 14:17
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes #169265
@bkonyi bkonyi requested a review from matanlurey August 6, 2025 18:20
@github-actions github-actions bot added the tool Affects the "flutter" command-line tool. See also t: labels. label Aug 6, 2025
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Code Review

This pull request addresses a race condition that can occur when multiple Flutter tools (like flutter run and flutter attach) try to start the Dart Development Service (DDS) simultaneously. The core change introduces a retry mechanism with exponential backoff when DDS fails to start, making the tool more resilient to these race conditions. The allowExistingDdsInstance parameter has been removed across the codebase as the new logic handles this implicitly. A new integration test has been added to verify the fix. The changes look solid. I have one suggestion to slightly improve the implementation of the retry logic.

@bkonyi bkonyi requested a review from chingjun August 8, 2025 16:54
@bkonyi bkonyi added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 11, 2025
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auto-submit bot commented Aug 11, 2025

autosubmit label was removed for flutter/flutter/173362, because Pull request flutter/flutter/173362 is not in a mergeable state.

@bkonyi bkonyi added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 11, 2025
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auto-submit bot commented Aug 11, 2025

autosubmit label was removed for flutter/flutter/173362, because - The status or check suite Mac tool_integration_tests_4_5 has failed. Please fix the issues identified (or deflake) before re-applying this label.

@bkonyi bkonyi added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 11, 2025
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autosubmit label was removed for flutter/flutter/173362, because Pull request flutter/flutter/173362 is not in a mergeable state.

@auto-submit auto-submit bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Aug 11, 2025
@bkonyi bkonyi added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 12, 2025
@auto-submit auto-submit bot added this pull request to the merge queue Aug 12, 2025
Merged via the queue into master with commit fbba4be Aug 12, 2025
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@auto-submit auto-submit bot deleted the fix_issue_169265 branch August 12, 2025 15:27
@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Aug 12, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 12, 2025
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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 13, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 13, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 13, 2025
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Aug 13, 2025
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auto-submit bot pushed a commit to flutter/packages that referenced this pull request Aug 13, 2025
Roll Flutter from e2a347b14a18 to 34c2a3b158b2 (41 revisions)

flutter/flutter@e2a347b...34c2a3b

2025-08-13 [email protected] [ Tool ] Mark Linux_pixel_7pro linux_chrome_dev_mode as bringup (flutter/flutter#173646)
2025-08-13 [email protected] [ Widget Preview ] Move `--dtd-url` from a global flag to a `widget-preview start` option (flutter/flutter#173712)
2025-08-13 [email protected] Null aware elements clean-ups (flutter/flutter#173074)
2025-08-13 [email protected] Roll Skia from 29e3e1ab7f62 to f7fdda3cd0e6 (3 revisions) (flutter/flutter#173709)
2025-08-13 [email protected] Regular windows win32 engine (flutter/flutter#173424)
2025-08-13 [email protected] Roll Dart SDK from a098cb676fd6 to 73153bdc1459 (1 revision) (flutter/flutter#173708)
2025-08-13 [email protected] Roll Fuchsia Linux SDK from vgv-rTf7i9PfcDq2Y... to I1TfNmsqTp7t3rO8e... (flutter/flutter#173690)
2025-08-13 [email protected] Roll Skia from 1170405c30cf to 29e3e1ab7f62 (2 revisions) (flutter/flutter#173689)
2025-08-13 [email protected] Roll Dart SDK from e2b7aec7333e to a098cb676fd6 (4 revisions) (flutter/flutter#173683)
2025-08-13 [email protected] Roll Skia from d06fdf03c6a1 to 1170405c30cf (4 revisions) (flutter/flutter#173681)
2025-08-13 [email protected] Roll Skia from 9ed4b4e53db2 to d06fdf03c6a1 (11 revisions) (flutter/flutter#173661)
2025-08-12 [email protected] Fix GTK redraw call being called from non-GTK thread. (flutter/flutter#173602)
2025-08-12 [email protected] [Impeller] Apply Y coordinate scaling when sampling from the destination texture in framebuffer advanced blends (flutter/flutter#173639)
2025-08-12 [email protected] Fix directional focus in nested scrollables with different axis (flutter/flutter#172875)
2025-08-12 [email protected] [ios][tools]do not log "bonjour not found" at all (unless verbose) (flutter/flutter#173569)
2025-08-12 [email protected] Remove jetifier usages  (flutter/flutter#173548)
2025-08-12 [email protected] [ Tool ] Fix run_linux_chrome_dev_mode (flutter/flutter#173647)
2025-08-12 [email protected] [ios] Update iOS code signing CIPD instruction command (flutter/flutter#171173)
2025-08-12 [email protected] Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (flutter/flutter#173628)
2025-08-12 [email protected] Roll Clang to 8c7a2ce01a77c96028fe2c8566f65c45ad9408d3 (flutter/flutter#173429)
2025-08-12 [email protected] [web] Fallback to CanvasKit when WebGL is not available (flutter/flutter#173629)
2025-08-12 [email protected] Roll Packages from a114ac2 to 08a9b2c (3 revisions) (flutter/flutter#173625)
2025-08-12 [email protected] [ Tool ] Fix crash from possible DDS startup race (flutter/flutter#173362)
2025-08-12 [email protected] Roll Skia from a2936eff2179 to 9ed4b4e53db2 (3 revisions) (flutter/flutter#173611)
2025-08-12 49699333+dependabot[bot]@users.noreply.github.com Bump actions/checkout from 4 to 5 in the all-github-actions group (flutter/flutter#173606)
2025-08-12 [email protected] Roll Dart SDK from c5fe48aee60d to e2b7aec7333e (1 revision) (flutter/flutter#173604)
2025-08-12 [email protected] Roll Skia from 44bb9d908ee4 to a2936eff2179 (21 revisions) (flutter/flutter#173603)
2025-08-12 [email protected] Fix the issue of over-scrolling in SliverMainAxisGroup with a PinnedHeaderSliver. (flutter/flutter#173349)
2025-08-12 [email protected] Roll Dart SDK from b2a23936f968 to c5fe48aee60d (2 revisions) (flutter/flutter#173596)
2025-08-11 [email protected] Update CanRenderTiledTexture unit tests (flutter/flutter#173553)
2025-08-11 [email protected] Update integration test for iOS deployment workflows (flutter/flutter#173566)
2025-08-11 [email protected] Enables vulkan for PowerVR B-Series (flutter/flutter#173561)
2025-08-11 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (#173568)" (flutter/flutter#173587)
2025-08-11 [email protected] Roll Dart SDK from 8e882349fcab to b2a23936f968 (2 revisions) (flutter/flutter#173571)
2025-08-11 [email protected] Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (flutter/flutter#173568)
2025-08-11 [email protected] Update CI iOS tests (flutter/flutter#173563)
2025-08-11 [email protected] Roll Packages from 34948d1 to a114ac2 (4 revisions) (flutter/flutter#173556)
2025-08-11 [email protected] Roll Fuchsia Linux SDK from HclTm0V8hgSpfqmtG... to vgv-rTf7i9PfcDq2Y... (flutter/flutter#173505)
2025-08-11 [email protected] Roll Dart SDK from 6a7ae1ffd1c9 to 8e882349fcab (2 revisions) (flutter/flutter#173499)
2025-08-11 [email protected] Update `ExpansibleController` in `ExpansionTile` `didUpdateWidget` (flutter/flutter#173175)
2025-08-11 [email protected] add format cmd to tools instruction (flutter/flutter#173428)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages
Please CC [email protected],[email protected] on the revert to ensure that a human
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SydneyBao pushed a commit to SydneyBao/flutter that referenced this pull request Aug 14, 2025
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes flutter#169265
ksokolovskyi pushed a commit to ksokolovskyi/flutter that referenced this pull request Aug 19, 2025
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes flutter#169265
mboetger pushed a commit to mboetger/flutter that referenced this pull request Sep 18, 2025
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes flutter#169265
korca0220 pushed a commit to korca0220/flutter that referenced this pull request Sep 22, 2025
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes flutter#169265
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 12, 2025
lucaantonelli pushed a commit to lucaantonelli/flutter that referenced this pull request Nov 21, 2025
It's possible (but unlikely) that two DDS instances can try and start at
the same time (e.g., a "flutter run" is initiated while an existing
"flutter attach" is waiting for a target to attach to). This can lead to
DDS failing to initialize for one of the processes when the VM service
disconnects it after the other process successfully invokes the
"_yieldControlToDDS" RPC.

This change adds some retry logic to avoid crashing in this scenario.

Fixes flutter#169265
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"flutter attach" fails with "Failed to start DDS" if run before the app is up and running

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