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  1. Moodle
  2. MDL-60773

autocomplete regularly fails with stale elements

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    Description

      We see regular autocomplete behat failures:

      002 Scenario: Adding a user to multiple groups               # /var/www/html/moodle/enrol/tests/behat/add_to_group.feature:26
            And I click on "Group 2" item in the autocomplete list # /var/www/html/moodle/enrol/tests/behat/add_to_group.feature:34
              WebDriver\Exception\StaleElementReference: stale element reference: element is not attached to the page document
                (Session info: chrome=61.0.3163.100)
                (Driver info: chromedriver=2.33.506092 (733a02544d189eeb751fe0d7ddca79a0ee28cce4),platform=Linux 4.4.0-97-generic x86_64) in /var/www/html/moodle/vendor/instaclick/php-webdriver/lib/WebDriver/Exception.php:155
              Stack trace:
              #0 /var/www/html/moodle/vendor/instaclick/php-webdriver/lib/WebDriver/AbstractWebDriver.php(157): WebDriver\Exception::factory(10, 'stale element r...')
      

      These stale elements are essentially race conditions between behat (slow moving) and our JS (faster but obstructed by server).

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              dobedobedoh Andrew Lyons
              dobedobedoh Andrew Lyons
              Jun Pataleta Jun Pataleta
              Damyon Wiese Damyon Wiese
              CiBoT CiBoT
              Andrew Lyons, Huong Nguyen, Jun Pataleta, Michael Hawkins, Shamim Rezaie, Simey Lameze, Stevani Andolo, Jake Dallimore, Mathew May, Mihail Geshoski, Andrew Lyons, Huong Nguyen, Jun Pataleta, Michael Hawkins, Shamim Rezaie, Simey Lameze, Stevani Andolo
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              Dates

                Created:
                Updated:
                Resolved:
                15/Jan/18