[Question] When running two or more browser instance for running test cases, all the test cases fails with in Docker

[raju-singh]

When running two or more browser instance for running test cases, all the test cases fails with timeout error inside docker container

[mxschmitt]

Could you give us more insights into your environment? Which browser, Playwright version, testing setup and which Docker file would be really helpful. If possible, also a small reproducible in a repository.

I tried this one in the official Docker image, which works:

// @ts-check
const playwright = require("playwright");

const createPages = async (browserType) => {
  /** @type {import('playwright').Browser} */
  const browser = await playwright[browserType].launch();
  const page1 = await browser.newPage();
  await page1.goto("https://try.playwright.tech")
  await page1.screenshot({ path: `example-${browserType}-1.png` });

  const page2 = await browser.newPage();
  await page2.goto("https://google.com")
  await page2.screenshot({ path: `example-${browserType}-2.png` });
  return browser
}

(async () => {
  for (const browserType of ['chromium', 'webkit', 'firefox']) {
    const browser1 = await createPages(browserType)
    const browser2 = await createPages(browserType)

    await browser1.close();
    await browser2.close();
  }
})();

Here also interactively (only multiple pages), which is based on the official Docker image.