org.openqa.selenium.SessionNotCreatedException：无法创建新会话。 （原始错误：请求了一个新会话，但一个正在进行中）

Question

我正在为 iOS 使用 Appium 1.4.8。我已经使用 xcode 在模拟器中构建了代码，并且能够成功启动服务器和 Appium Inspector。但是在运行我的代码时，它抛出了以下错误。

我的能力是@BeforeMethod public void setUp() throws MalformedURLException{

 DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("appium-version", "1.0");
capabilities.setCapability("platformName", "iOS");
capabilities.setCapability("platformVersion", "8.4");
capabilities.setCapability("deviceName", "iPad 2");
capabilities.setCapability("app", "/Users/arunhs/Desktop/AppiumReq/SRC/build/Debug-iphonesimulator/ComplianceWire.app");
driver = new AppiumDriver(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS);

}

 Error is:
FAILED CONFIGURATION: @BeforeMethod setUp
org.openqa.selenium.SessionNotCreatedException: A new session could not be created. (Original error: Requested a new session but one was in progress) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 447 milliseconds
Build info: version: '2.47.1', revision: '411b314', time: '2015-07-30 03:03:16'
System info: host: 'N/A', ip: 'N/A', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.10.4', java.version: '1.7.0_79'
Driver info: io.appium.java_client.AppiumDriver
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:595)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:88)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:242)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:128)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:155)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:44)
at com.selenium.test.DriverScript.setUp(DriverScript.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:515)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:590)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:834)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1142)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:771)
at org.testng.TestRunner.run(TestRunner.java:621)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1176)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1101)
at org.testng.TestNG.run(TestNG.java:1009)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)

原文由 amitav 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

发生这种情况是因为前一个会话未正确关闭，并且在您的测试中抛出异常时发生。重新启动 appium 服务器并尝试，它应该可以解决问题。

或者，如果您将 appium 作为节点进程启动，您可以提供选项 '--session-override true' 这将避免此问题

原文由 Shambu 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

如果在 appium 应用程序上，则选择 Override Existing Sessions 设置下的复选框 -

原文由 Tarun 发布，翻译遵循 CC BY-SA 3.0 许可协议