NoSuchWindowError: Browsing context has been discarded with GeckoDriver Firefox and Protractor(Selenium)
NoSuchWindowError: Browsing context has been discarded with GeckoDriver Firefox and Protractor(Selenium)
我正在尝试 运行 使用量角器的简单测试脚本。
环境：
Node Version: v9.8.0
Protractor Version: 5.4.1
Angular Version: 1.x
Browser(s): Mozilla Firefox 60.1.0
Operating System and Version: HELiOS release 6.10
这是我的量角器配置文件。
exports.config = {
specs: ['todo-spec.js'],
capabilities: {
browserName: 'firefox',
marionette : true
}
};
这是我的测试脚本(todo-spec.js)
describe('application homepage', function() {
it('should open homepage', function() {
console.log("Opening localhost app");
browser.get('http://localhost:8080/app/');
browser.sleep(20000); // just to check if application loaded or not
});
});
这是我的 node_modules/protractor/node_modules/webdriver-manager/selenium/ 目录，如下所示：
当我 运行 我的测试使用 /path/to/protractor conf.js 时，我遇到下面提到的错误。
[16:51:03] I/launcher - Running 1 instances of WebDriver
[16:51:03] I/local - Starting selenium standalone server...
[16:51:04] I/local - Selenium standalone server started at http://<ip-address>:45089/wd/hub
Started
Opening localhost
F
Failures:
1) application homepage should open homepage
Message:
Failed: Browsing context has been discarded
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'HOSTNAME', ip: 'ip_address', os.name: 'Linux', os.arch: 'i386', os.version: '2.6.32-754.3.5.el6.x86_64', java.version: '1.8.0_181'
Driver info: driver.version: unknown
Stack:
NoSuchWindowError: Browsing context has been discarded
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'HOSTNAME', ip: 'ip_address', os.name: 'Linux', os.arch: 'i386', os.version: '2.6.32-754.3.5.el6.x86_64', java.version: '1.8.0_181'
Driver info: driver.version: unknown
at Object.checkLegacyResponse (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/error.js:546:15)
at parseHttpResponse (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/http.js:509:13)
at doSend.then.response (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/http.js:441:30)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:118:7)
From: Task: Protractor.get(http://localhost:8080/app/) - reset url
at thenableWebDriverProxy.schedule (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/webdriver.js:807:17)
at ProtractorBrowser.executeScriptWithDescription (/export/home/test/protractor_test_2/node_modules/protractor/built/browser.js:404:28)
at driver.controlFlow.execute.then.then.then (/export/home/test/protractor_test_2/node_modules/protractor/built/browser.js:679:25)
at ManagedPromise.invokeCallback_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:1376:14)
at TaskQueue.execute_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:3084:14)
at TaskQueue.executeNext_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:3067:27)
at asyncRun (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:2927:27)
at /export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:668:7
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:118:7)
From: Task: Run it("should open homepage") in control flow
at UserContext.<anonymous> (/export/home/test/protractor_test_2/node_modules/jasminewd2/index.js:94:19)
From asynchronous test:
Error
at Suite.<anonymous> (/export/home/test/protractor_test_2/todo-spec.js:2:3)
at Object.<anonymous> (/export/home/test/protractor_test_2/todo-spec.js:1:63)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)
1 spec, 1 failure
Finished in 0.159 seconds
[16:51:06] I/local - Shutting down selenium standalone server.
[16:51:06] I/launcher - 0 instance(s) of WebDriver still running
[16:51:06] I/launcher - firefox #01 failed 1 test(s)
[16:51:06] I/launcher - overall: 1 failed spec(s)
[16:51:06] E/launcher - Process exited with error code 1
如有任何帮助，我们将不胜感激。
这个错误信息...
Failed: Browsing context has been discarded
...意味着 GeckoDriver 和 Marionette 之间的通信中断了。
一些关于 GeckoDriver 二进制版本的更多信息会给我们一些关于发生了什么问题的线索。但是，由于以下多种因素，可能会发生此问题：
- 根据 Hang when navigation request removes the current browsing context 如果您在 Selenium 的 焦点位于
<iframe> 内时使用 driver.navigate().back();，则会观察到此错误。
- 根据 Crash during command execution results in "Internal Server Error: Failed to decode response from marionette"，由于 ctypes 检查 NULL 指针 derefs，也会出现此问题。
- 您可以找到 Selenium 测试用例 here。也许与其恐慌，不如通过清除任何状态并返回 geckodriver 再次接受新连接来更优雅地处理这个问题。
- 根据 Failed to decode response from marionette - Error to open Webdriver using python，如果您没有使用兼容版本的二进制文件，也会出现此问题。
这个用例
这个问题的根本原因似乎是 MemoryUsage。根据 Intermittent awsy\test_memory_usage.py TestMemoryUsage.test_open_tabs | NoSuchWindowException: Browsing context has been discarded 本质上是 间歇性 。这个问题曾经被标记为 RESOLVED 然后又被标记为 REOPENED.
正如@Madhan 在使用 AngularJS 应用程序和 Protractor 时提到的，总是包括：
waitForAngularEnabled(true);
最后，根据使用 GeckoDriver、Selenium 和 Firefox 浏览器 的最佳实践请遵循以下兼容性图表：
Supported platforms
能够使用以下配置解决此问题。
- Protractor: v5.4.1
- Selenium JAR driver: selenium-server-standalone-3.141.59.jar
- geckodriver:geckodriver-v0.20.0-linux64
我们还需要在量角器 conf 文件中给出 geckodrvier 的路径。
geckoDriver: 'node_modules/protractor/node_modules/webdriver-manager/selenium/geckodriver-v0.20.0'
默认情况下，webdriver-manager 将下载最新版本的 geckodriver，即 0.24.0。但是需要的 geckdriver 是 v0.20.0，所以我手动下载了这个并把它放在 node_modules/protractor/node_modules/webdriver-manager/selenium/ 目录中。
希望这对面临类似问题的人有所帮助。
我正在尝试 运行 使用量角器的简单测试脚本。
环境：
Node Version: v9.8.0
Protractor Version: 5.4.1
Angular Version: 1.x
Browser(s): Mozilla Firefox 60.1.0
Operating System and Version: HELiOS release 6.10
这是我的量角器配置文件。
exports.config = {
specs: ['todo-spec.js'],
capabilities: {
browserName: 'firefox',
marionette : true
}
};
这是我的测试脚本(todo-spec.js)
describe('application homepage', function() {
it('should open homepage', function() {
console.log("Opening localhost app");
browser.get('http://localhost:8080/app/');
browser.sleep(20000); // just to check if application loaded or not
});
});
这是我的 node_modules/protractor/node_modules/webdriver-manager/selenium/ 目录，如下所示：
当我 运行 我的测试使用 /path/to/protractor conf.js 时，我遇到下面提到的错误。
[16:51:03] I/launcher - Running 1 instances of WebDriver
[16:51:03] I/local - Starting selenium standalone server...
[16:51:04] I/local - Selenium standalone server started at http://<ip-address>:45089/wd/hub
Started
Opening localhost
F
Failures:
1) application homepage should open homepage
Message:
Failed: Browsing context has been discarded
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'HOSTNAME', ip: 'ip_address', os.name: 'Linux', os.arch: 'i386', os.version: '2.6.32-754.3.5.el6.x86_64', java.version: '1.8.0_181'
Driver info: driver.version: unknown
Stack:
NoSuchWindowError: Browsing context has been discarded
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'HOSTNAME', ip: 'ip_address', os.name: 'Linux', os.arch: 'i386', os.version: '2.6.32-754.3.5.el6.x86_64', java.version: '1.8.0_181'
Driver info: driver.version: unknown
at Object.checkLegacyResponse (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/error.js:546:15)
at parseHttpResponse (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/http.js:509:13)
at doSend.then.response (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/http.js:441:30)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:118:7)
From: Task: Protractor.get(http://localhost:8080/app/) - reset url
at thenableWebDriverProxy.schedule (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/webdriver.js:807:17)
at ProtractorBrowser.executeScriptWithDescription (/export/home/test/protractor_test_2/node_modules/protractor/built/browser.js:404:28)
at driver.controlFlow.execute.then.then.then (/export/home/test/protractor_test_2/node_modules/protractor/built/browser.js:679:25)
at ManagedPromise.invokeCallback_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:1376:14)
at TaskQueue.execute_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:3084:14)
at TaskQueue.executeNext_ (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:3067:27)
at asyncRun (/export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:2927:27)
at /export/home/test/protractor_test_2/node_modules/selenium-webdriver/lib/promise.js:668:7
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:118:7)
From: Task: Run it("should open homepage") in control flow
at UserContext.<anonymous> (/export/home/test/protractor_test_2/node_modules/jasminewd2/index.js:94:19)
From asynchronous test:
Error
at Suite.<anonymous> (/export/home/test/protractor_test_2/todo-spec.js:2:3)
at Object.<anonymous> (/export/home/test/protractor_test_2/todo-spec.js:1:63)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)
1 spec, 1 failure
Finished in 0.159 seconds
[16:51:06] I/local - Shutting down selenium standalone server.
[16:51:06] I/launcher - 0 instance(s) of WebDriver still running
[16:51:06] I/launcher - firefox #01 failed 1 test(s)
[16:51:06] I/launcher - overall: 1 failed spec(s)
[16:51:06] E/launcher - Process exited with error code 1
如有任何帮助，我们将不胜感激。
这个错误信息...
Failed: Browsing context has been discarded
...意味着 GeckoDriver 和 Marionette 之间的通信中断了。
一些关于 GeckoDriver 二进制版本的更多信息会给我们一些关于发生了什么问题的线索。但是，由于以下多种因素，可能会发生此问题：
- 根据 Hang when navigation request removes the current browsing context 如果您在 Selenium 的 焦点位于
<iframe>内时使用driver.navigate().back();，则会观察到此错误。 - 根据 Crash during command execution results in "Internal Server Error: Failed to decode response from marionette"，由于 ctypes 检查 NULL 指针 derefs，也会出现此问题。
- 您可以找到 Selenium 测试用例 here。也许与其恐慌，不如通过清除任何状态并返回 geckodriver 再次接受新连接来更优雅地处理这个问题。
- 根据 Failed to decode response from marionette - Error to open Webdriver using python，如果您没有使用兼容版本的二进制文件，也会出现此问题。
这个用例
这个问题的根本原因似乎是 MemoryUsage。根据 Intermittent awsy\test_memory_usage.py TestMemoryUsage.test_open_tabs | NoSuchWindowException: Browsing context has been discarded 本质上是 间歇性 。这个问题曾经被标记为 RESOLVED 然后又被标记为 REOPENED.
正如@Madhan 在使用 AngularJS 应用程序和 Protractor 时提到的，总是包括：
waitForAngularEnabled(true);
最后，根据使用 GeckoDriver、Selenium 和 Firefox 浏览器 的最佳实践请遵循以下兼容性图表：
Supported platforms
能够使用以下配置解决此问题。
- Protractor: v5.4.1
- Selenium JAR driver: selenium-server-standalone-3.141.59.jar
- geckodriver:geckodriver-v0.20.0-linux64
我们还需要在量角器 conf 文件中给出 geckodrvier 的路径。
geckoDriver: 'node_modules/protractor/node_modules/webdriver-manager/selenium/geckodriver-v0.20.0'
默认情况下，webdriver-manager 将下载最新版本的 geckodriver，即 0.24.0。但是需要的 geckdriver 是 v0.20.0，所以我手动下载了这个并把它放在 node_modules/protractor/node_modules/webdriver-manager/selenium/ 目录中。
希望这对面临类似问题的人有所帮助。