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[flutter_tools] Retry chromedriver startup when its port is taken - #196150
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This pull request introduces a retry mechanism for starting the chromedriver process in web_server_test_common.dart. When chromedriver is started with --port=0, the OS-assigned port might already be in use on another loopback address, causing it to fail. The changes add a retry loop of up to three attempts that catches a new custom _ChromeDriverPortInUseException when a 'port not available' message is detected in the process output, allowing it to attempt binding to a new port. I have no feedback to provide.
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flutter/flutter@d463821...fffd8c2 2026-11-10 [email protected] Roll Fuchsia Test Scripts from 8QcsP_SmbsT09VgUs... to PXc5D7S_q6sIYpfFJ... (flutter/flutter#196273) 2026-11-10 [email protected] [web] Accept the capped letter spacing line shift in kitchensink (flutter/flutter#196148) 2026-11-10 [email protected] Fix Vulkan MSAA diagonal seam in FramebufferBlend (flutter/flutter#196197) 2026-11-10 [email protected] Read back images on the raster thread on OpenGLES (flutter/flutter#195927) 2026-11-10 [email protected] [web] Unify ui.Paint across CanvasKit and Skwasm (flutter/flutter#196071) 2026-11-10 [email protected] Roll Fuchsia Test Scripts from p3N3B-Kchh1bthB6n... to 8QcsP_SmbsT09VgUs... (flutter/flutter#196249) 2026-11-09 [email protected] [Impeller] Reland clipped BackdropFilter square corners fix (flutter/flutter#195716) 2026-11-09 [email protected] [web] Recreate canvas and context on CkOffscreenSurface resize to fix WebGL clipping (flutter/flutter#192769) 2026-11-09 [email protected] Roll Dart SDK from ee0f66fa0ad2 to a2baae273bb2 (1 revision) (flutter/flutter#196245) 2026-11-09 [email protected] Add Mac web_tool_tests_1_2 and _2_2 in bringup (flutter/flutter#196241) 2026-11-09 [email protected] Roll pub packages (flutter/flutter#196246) 2026-11-09 [email protected] Increase number of 'Windows tool_integration_tests' subshards (flutter/flutter#196243) 2026-11-09 [email protected] Roll Fuchsia Test Scripts from Jo-ZgQSNDuPsjlZ4s... to p3N3B-Kchh1bthB6n... (flutter/flutter#196238) 2026-11-09 [email protected] Skip UIScene pre-migration test cases on Xcode 27 (flutter/flutter#194755) 2026-11-09 [email protected] [flutter_tools] Share Analytics.isBot and make isRunningOnBot sync (flutter/flutter#194744) 2026-11-09 [email protected] [flutter_tools] Retry chromedriver startup when its port is taken (flutter/flutter#196150) 2026-11-09 [email protected] Remove unused vulkan_provider.cc (flutter/flutter#195513) 2026-11-09 [email protected] Roll Dart SDK from 3b174b7217fe to ee0f66fa0ad2 (13 revisions) (flutter/flutter#196217) 2026-11-09 [email protected] Goma is dead, long live RBE! (Take 2) (flutter/flutter#196212) 2026-11-09 [email protected] Split DevTools customer tests into its own customer_testing_devtools shard (flutter/flutter#195871) 2026-11-09 [email protected] Split mac_host_{debug,profile,release}_arm64_tests into one step per type (flutter/flutter#196031) If this roll has caused a breakage, revert this CL and set the roller to dry run mode 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 is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Follow-up to #194419.
On Linux,
chromedriver --port=0binds::1first and then binds127.0.0.1on the same port, exiting if it's taken. The port the OS picks for::1can still be in use on127.0.0.1, sohot_reload_web_server_testandhot_restart_web_server_testoccasionally fail with:Example CI failures:
This PR restarts chromedriver (up to 3 attempts) when it exits with that message. Each attempt gets a new port from the OS. I reproduced it locally by holding some IPv4 ports in a network namespace with a narrow ephemeral port range: successful launches went from 9/15 to 14/15.
ChromeDriver bug: https://issues.chromium.org/issues/582923020
Part of #194313