Intermittent failures in web_tool_tests due to failure to connect to chrome #86370
Closed as not planned
Description
The failures happened in HHH flutter web bot (running heads of engine, flutter, and dart SDK) that runs flutter web_tool_tests.
Related: #85043
Example: https://ci.chromium.org/ui/p/dart/builders/ci.sandbox/flutter-engine-linux/13586/overview
Failed to establish connection with the application instance in Chrome.
This can happen if the websocket connection used by the web tooling is unable to correctly establish a connection, for example due to a firewall.
#0 throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
#1 ResidentWebRunner.run (package:flutter_tools/src/isolated/resident_web_runner.dart:328:7)
<asynchronous suspension>
#2 AppDomain.launch.<anonymous closure> (package:flutter_tools/src/commands/daemon.dart:595:9)
<asynchronous suspension>
#3 AppDomain.launch (package:flutter_tools/src/commands/daemon.dart:593:5)
...