我在android设备上使用appium时遇到了这个异常org.openqa.selenium.remote.SessionNotFoundException:

org.openqa.selenium.remote.SessionNotFoundException-当我尝试调试代码时会发生此异常，在这期间（可能是因为延迟），应用程序在后台运行，我开始获得此异常。我不确定这是否是因为超时，如果是，在appium中，作为驱动程序或服务器级别的功能，在哪里增加它？我把while跟踪放在这里，任何帮助都将不胜感激

2015-12-16 14:30:15,598 ERROR projects.sdk.lib.ObjectsHandler getElement - 
Command duration or timeout: 8 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'VDO105-2.local', ip: '192.168.2.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.11.2', java.version: '1.7.0_75'
*** Element info: {Using=xpath, value=//android.widget.ImageView[@resource-id='android:id/home']}
Session ID: 4787f33a-c66e-46af-842b-3a41836b5d2c
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities [{platform=LINUX, app=/Users/user/Downloads/app-debug.apk, javascriptEnabled=true, browserName=Android, networkConnectionEnabled=true, desired={newCommandTimeout=30, app=/Users/user/Downloads/app-debug.apk, deviceName=Android, platformName=Android, serial=4d0025b440ca90d5}, locationContextEnabled=false, newCommandTimeout=30, platformVersion=5.0, databaseEnabled=false, deviceName=4d0025b440ca90d5, platformName=Android, webStorageEnabled=false, serial=4d0025b440ca90d5, warnings={}, takesScreenshot=true}]

org.openqa.selenium.remote.SessionNotFoundException: 
Command duration or timeout: 8 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'VDO105-2.local', ip: '192.168.2.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.11.2', java.version: '1.7.0_75'
*** Element info: {Using=xpath, value=//android.widget.ImageView[@resource-id='android:id/home']}
Session ID: 4787f33a-c66e-46af-842b-3a41836b5d2c
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities [{platform=LINUX, app=/Users/user/Downloads/app-debug.apk, javascriptEnabled=true, browserName=Android, networkConnectionEnabled=true, desired={newCommandTimeout=30, app=/Users/user/Downloads/app-debug.apk, deviceName=Android, platformName=Android, serial=4d0025b440ca90d5}, locationContextEnabled=false, newCommandTimeout=30, platformVersion=5.0, databaseEnabled=false, deviceName=4d0025b440ca90d5, platformName=Android, webStorageEnabled=false, serial=4d0025b440ca90d5, warnings={}, takesScreenshot=true}]
    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:164)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:647)
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:353)
    at org.openqa.selenium.remote.RemoteWebDriver.findElementByXPath(RemoteWebDriver.java:490)
    at org.openqa.selenium.By$ByXPath.findElement(By.java:361)
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:345)
    at projects.sdk.lib.ObjectsHandler.getElement(ObjectsHandler.java:84)
    at projects.sdk.lib.ObjectsHandler.menuNavigation(ObjectsHandler.java:142)
    at projects.sdk.lib.Actions.performAction(Actions.java:73)
    at projects.sdk.lib.GetResults.getDeviceJsonResult(GetResults.java:170)
    at projects.sdk.lib.GetResults.getResults(GetResults.java:76)
    at projects.sdk.SDKAdServingTest.sdkTest(SDKAdServingTest.java:242)
    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:84)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
    at org.testng.SuiteRunner.run(SuiteRunner.java:240)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
    at org.testng.TestNG.run(TestNG.java:1057)
    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)
2015-12-16 14:30:20,262 ERROR projects.sdk.lib.ObjectsHandler getElement - 
Command duration or timeout: 8 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'VDO105-2.local', ip: '192.168.2.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.11.2', java.version: '1.7.0_75'
*** Element info: {Using=xpath, value=//android.widget.TextView[@text='Banner']}
Session ID: 4787f33a-c66e-46af-842b-3a41836b5d2c
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities [{platform=LINUX, app=/Users/user/Downloads/app-debug.apk, javascriptEnabled=true, browserName=Android, networkConnectionEnabled=true, desired={newCommandTimeout=30, app=/Users/user/Downloads/app-debug.apk, deviceName=Android, platformName=Android, serial=4d0025b440ca90d5}, locationContextEnabled=false, newCommandTimeout=30, platformVersion=5.0, databaseEnabled=false, deviceName=4d0025b440ca90d5, platformName=Android, webStorageEnabled=false, serial=4d0025b440ca90d5, warnings={}, takesScreenshot=true}]

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如果appium在60秒内没有收到任何新命令，它将自动关闭。调试代码时可能会出现这种情况。
您可以通过搜索appium日志中的以下行来验证appium是否已自动关闭：

info: [debug] We shut down because no new commands came in

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点击并尝试后，我发现这个解决方案有效：我将此功能添加到驱动程序：

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setCapability（“newCommandTimeout”，timeout）

您能分享您为连接设备而编写的代码吗？@HelpingHands:我将启动appium作为后端服务器，而不是UI。我正在使用以下命令启动服务器：export PATH=$PATH:/usr/local/bin/usr/local/bin/appium-g/tmp/applog_12162015_022917.txt--no reset--command timeout 60如何阻止appium死亡，我已经在使用参数--command timeout 60启动appium，但这似乎没有帮助，还有其他出路吗？派对有点晚了，但是试试：DesiredCapabilities capa=new DesiredCapabilities（）；capa.setCapability（“NewcommMandTimeout”，1000）。。。