[BUG] Error at show HTML report

Context:

• Playwright Version: playwright/test 1.16.3
• Operating System: Windows
• Node.js version: 16.13
• Browser: All
• Extra: [any specific details about your environment]

Code Snippet

node:events:368
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::9323
    at Server.setupListenHandle [as _listen2] (node:net:1334:16)
    at listenInCluster (node:net:1382:12)
    at Server.listen (node:net:1469:7)
    at HttpServer.start (D:\Software Testing\Projects\SA_repos\TRACKING_automated_regression_tests\node_modules\playwright-core\lib\utils\httpServer.js:85:18)
    at showHTMLReport (D:\Software Testing\Projects\SA_repos\TRACKING_automated_regression_tests\node_modules\@playwright\test\lib\reporters\html.js:103:28)
    at HtmlReporter.onEnd (D:\Software Testing\Projects\SA_repos\TRACKING_automated_regression_tests\node_modules\@playwright\test\lib\reporters\html.js:72:15)
    at Multiplexer.onEnd (D:\Software Testing\Projects\SA_repos\TRACKING_automated_regression_tests\node_modules\@playwright\test\lib\reporters\multiplexer.js:73:7)
    at Runner._run (D:\Software Testing\Projects\SA_repos\TRACKING_automated_regression_tests\node_modules\@playwright\test\lib\runner.js:400:7)
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1361:8)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 9323
}

Describe the bug

After test finishes and html report is to be auto served, the error displayed above is thrown. When I try to open http://localhost:9323, the HTML report is shown, although it is not fully functional - for example clicking on the failed test case to show details will open only blank page.

[pavelfeldman]

The issue is that there is a process running on your system that keeps the 9223 port open. You should find the process that keeps the port open and kill it!

[mxschmitt]

~~Update: I was able to reproduce it! ~~