org.openqa.selenium.NoSuchSessionException:在docker容器中找不到使用Be

Question

我正在尝试用Behat/Mink和Selenium2Driver测试Symfony3 web应用程序，这样我也可以测试Javascript的功能。

该应用程序在docker容器中运行，因此我为selenium-hub和chrome添加了一个新的docker容器，如下所述：

# docker-compose.yml
version: '3.5' # Docker Engine release 17.12.0+
networks:
servicesnet:
driver: bridge
services:
apache:
build:
context: './apache2'
container_name: apache-service
ports:
- "80:80"
- "443:443"
tty: true
networks:
- servicesnet
volumes:
- ${HOST_APACHE_CONFIG}:/etc/apache2
- ${HOST_PAGES_PATH}:/var/www/localhost/htdocs
selenium-hub:
image: selenium/hub:4.0.0-alpha-6-20200730
container_name: selenium-hub
ports:
- "4444:4444"
networks:
- servicesnet
chrome:
image: selenium/node-chrome:4.0.0-alpha-6-20200730
volumes:
- /dev/shm:/dev/shm
depends_on:
- selenium-hub
environment:
- HUB_HOST=selenium-hub
networks:
- servicesnet

当我运行docker-compose up时，它为新容器输出：

chrome          | 2020-08-12 07:36:19,917 INFO Included extra file "/etc/supervisor/conf.d/selenium.conf" during parsing
chrome          | 2020-08-12 07:36:19,918 INFO supervisord started with pid 7
selenium-hub    | 2020-08-12 07:36:19,297 INFO Included extra file "/etc/supervisor/conf.d/selenium-grid-hub.conf" during parsing
selenium-hub    | 2020-08-12 07:36:19,298 INFO supervisord started with pid 7
selenium-hub    | 2020-08-12 07:36:20,301 INFO spawned: 'selenium-grid-hub' with pid 10
selenium-hub    | Starting Selenium Grid Hub...
selenium-hub    | 2020-08-12 07:36:20,311 INFO success: selenium-grid-hub entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-hub    | 07:36:20.588 INFO [LoggingOptions.getTracer] - Using OpenTelemetry for tracing
selenium-hub    | 07:36:20.589 INFO [LoggingOptions.createTracer] - Using OpenTelemetry for tracing
selenium-hub    | 07:36:20.607 INFO [EventBusOptions.createBus] - Creating event bus: org.openqa.selenium.events.zeromq.ZeroMqEventBus
selenium-hub    | 07:36:20.638 INFO [BoundZmqEventBus.<init>] - XPUB binding to [binding to tcp://*:4442, advertising as tcp://172.28.0.3:4442], XSUB binding to [binding to tcp://*:4443, advertising as tcp://172.28.0.3:4443]
selenium-hub    | 07:36:20.676 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://172.28.0.3:4442 and tcp://172.28.0.3:4443
selenium-hub    | 07:36:20.680 INFO [UnboundZmqEventBus.<init>] - Sockets created
selenium-hub    | 07:36:20.681 INFO [UnboundZmqEventBus.lambda$new$2] - Bus started
chrome          | 2020-08-12 07:36:21,136 INFO success: xvfb entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,136 INFO success: fluxbox entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,136 INFO success: vnc entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,137 INFO success: selenium-node entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-hub    | 07:36:21.308 INFO [Hub.execute] - Started Selenium hub 4.0.0-alpha-6 (revision 5f43a29cfc): http://172.28.0.3:4444
chrome          | 07:36:21.774 INFO [LoggingOptions.getTracer] - Using OpenTelemetry for tracing
chrome          | 07:36:21.775 INFO [LoggingOptions.createTracer] - Using OpenTelemetry for tracing
chrome          | 07:36:21.791 INFO [EventBusOptions.createBus] - Creating event bus: org.openqa.selenium.events.zeromq.ZeroMqEventBus
chrome          | 07:36:21.829 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://selenium-hub:4442 and tcp://selenium-hub:4443
chrome          | 07:36:21.857 INFO [UnboundZmqEventBus.<init>] - Sockets created
chrome          | 07:36:21.859 INFO [UnboundZmqEventBus.lambda$new$2] - Bus started
chrome          | 07:36:22.121 INFO [NodeServer.execute] - Reporting self as: http://172.28.0.5:5555
chrome          | 07:36:22.175 INFO [NodeOptions.report] - Adding Chrome for {"browserName": "chrome"} 8 times
chrome          | 07:36:22.298 INFO [NodeServer.execute] - Started Selenium node 4.0.0-alpha-6 (revision 5f43a29cfc): http://172.28.0.5:5555
chrome          | 07:36:22.302 INFO [NodeServer.execute] - Starting registration process for node id ff0154a7-ed4b-438a-887c-0a7f3a988cb4
selenium-hub    | 07:36:22.355 INFO [LocalDistributor.refresh] - Creating a new remote node for http://172.28.0.5:5555
selenium-hub    | 07:36:22.763 INFO [LocalDistributor.add] - Added node ff0154a7-ed4b-438a-887c-0a7f3a988cb4.
selenium-hub    | 07:36:22.770 INFO [Host.lambda$new$0] - Changing status of node ff0154a7-ed4b-438a-887c-0a7f3a988cb4 from DOWN to UP. Reason: http://172.28.0.5:5555 is ok
chrome          | 07:36:22.774 INFO [NodeServer.lambda$execute$0] - Node has been added

然后我有了下一个测试方法：

<?php
namespace TestsAppBundleController;
use BehatMinkDriverSelenium2Driver;
use BehatMinkMink;
use BehatMinkSession;
use SymfonyBundleFrameworkBundleClient;
use SymfonyBundleFrameworkBundleTestWebTestCase;
abstract class BaseControllerTest extends WebTestCase
{
/**
* @var Client
*/
protected $client;
/**
* @var Session
*/
protected $session;
public function visitUri($uri)
{
$this->client = static::createClient();
$pass = $this->client->getKernel()->getContainer()->getParameter('http_basic_auth_pass');
$host = 'localhost'; // I've tried several things here (like 172.28.0.5:5555)
$driver = new Selenium2Driver('chrome');
$mink = new Mink(array(
'chrome' => new Session($driver)
));
$driver->setTimeouts(['page load' => 900000]);
$mink->setDefaultSessionName('chrome');
$this->session = $mink->getSession();
$this->session->visit('http://user:' . $pass . '@' . $host . $uri);
}
}

我把这种方法称为特定测试：

public function testClickOnSearch()
{
$this->visitUri(/mi-custom-uri);
$page = $this->session->getPage();
$this->session->wait(
200000,
"typeof jQuery !== 'undefined'"
);
$page->findButton('Buton text')->click();
$this->assertContains('my-custom-uri-2', $this->session->getCurrentUrl());
}

但我从来没有开始上课。如果我转到http://localhost:4444/wd/hub/session/url，我会看到以下错误消息：

"org.openqa.selenium.NoSuchSessionException：找不到ID为url的会话\n生成信息：版本："4.0.0-alpha-6"，修订版："5f43a29cfc"\n系统信息：主机："fca78c7f81e6"，ip:"172.28.0.3"，os.name:"Linux"，os.arch:"amd64"，os.version:"5.4.0-42-generic"，java.version:"1.8.0_252"\n驱动程序信息：驱动程序.version:unknown；

执行测试时，200秒后抛出此错误：

PHP致命错误：调用空上的成员函数click((

我确定少了什么，但不知道是什么。知道吗？

Answer 1

此错误消息。。。

org.openqa.selenium.NoSuchSessionException: Unable to find session with ID: urln
Build info: version: '4.0.0-alpha-6', revision: '5f43a29cfc'n
System info: host: 'fca78c7f81e6', ip: '172.28.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-42-generic', java.version: '1.8.0_252'n
Driver info: driver.version: unknown

意味着ChromeDriver无法启动/生成新的浏览上下文，即Chrome浏览器会话，该会话在日志中反映为：

Driver info: driver.version: unknown

因此，向前看，你会看到错误：

PHP Fatal error: Call to a member function click() on null

最容易出现问题的原因是您使用的二进制文件版本之间存在不兼容。

---

解决方案

确保：

• ChromeDriver更新为当前ChromeDriver v84.0级别
• Chrome更新到当前Chrome 84.0版本。(根据ChromeDriver v84.0发布说明(
• 如果您的基本Web客户端版本太旧，请将其卸载并安装最新的GA和发布的Web客户端版本
• 进行系统重新启动
• 总是调用CCD_ 4方法中的CCD_；优雅地销毁WebDriver和Web客户端实例

---

参考

您可以在中找到一些相关的详细讨论

• org.openqa.selenium.NoSuchSessionException：在使用ChromeDriver Chrome和Java的selenium自动化测试中没有这样的会话错误

Answer 2

发现您在docker容器中使用硒。然后您可以尝试环境变量SE_NODE_SESSION_TIMEOUT=999999