Updated the files.

my-app/node_modules/karma/lib/launchers/retry.js

@@ -0,0 +1,31 @@
+const log = require('../logger').create('launcher')
+
+function RetryLauncher (retryLimit) {
+  this._retryLimit = retryLimit
+
+  this.on('done', () => {
+    if (!this.error) {
+      return
+    }
+
+    if (this._retryLimit > 0) {
+      log.info(`Trying to start ${this.name} again (${retryLimit - this._retryLimit + 1}/${retryLimit}).`)
+      this.restart()
+      this._retryLimit--
+    } else if (this._retryLimit === 0) {
+      log.error(`${this.name} failed ${retryLimit} times (${this.error}). Giving up.`)
+    } else {
+      log.debug(`${this.name} failed (${this.error}). Not restarting.`)
+    }
+  })
+}
+
+RetryLauncher.decoratorFactory = function (retryLimit) {
+  return function (launcher) {
+    RetryLauncher.call(launcher, retryLimit)
+  }
+}
+
+RetryLauncher.decoratorFactory.$inject = ['config.retryLimit']
+
+module.exports = RetryLauncher