org.openqa.selenium.SessionNotCreatedException: A new session could not be created. (Original error: Requested a new session but one was in progress)

Question

I am using Appium 1.4.8 for iOS . I have build the code in simulator using xcode and successfully able to launch the server as well as Appium Inspector. But while running my code it is throwing the below error.

My capabilities are @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)

Answer 1

This happens because the previous session wasn't shutdown properly and it happens when there is exception thrown in your test. Restart the appium server and try it , it should resolve the issue.

Alternatively if you starting appium as node process, you can give option '--session-override true' and this would avoid this problem

Answer 2

If on appium app then select Override Existing Sessions checkbox under Settings -

Answer 3

The following is working for me. I am testing by connecting Android device. Please make changes as per your need and apply, this should work now.

        DesiredCapabilities capabilities = new DesiredCapabilities().android();
        capabilities.setCapability("no",true);
        capabilities.setCapability("newCommandTimeout", 100000);
        capabilities.setCapability("noReset", true);
        capabilities.setCapability(CapabilityType.BROWSER_NAME, "");
        capabilities.setCapability(CapabilityType.VERSION, "4.4.2");
        capabilities.setCapability("deviceName", "Galaxy nexus");
        capabilities.setCapability("app", application.getAbsolutePath());
        capabilities.setCapability("automationName", "selendroid");
        capabilities.setCapability("noRest", true);
        driver = new AndroidDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);

Answer 4

Adding the deviceName in the capabilities helped. In the appium logs I could figure out the missing thing.

Answer 5

Kill running servers in the task manager like appium , basically end the task of cmd.

Answer 6

The easiest way that I found was stop the Appium server, Quit it wait for some seconds and again start it and run your script. If needed can do with emulator as well