> info: [debug] Removing any old apks
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "ls /data/local/tmp/*.apk"
> info: [debug] Found an apk we want to keep at /data/local/tmp/5487d3a12a3d1e947f77f8b43119db85.apk
> info: [debug] Couldn't find any apks to remove
> info: [debug] Uninstalling com.wanjia.lend
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "am force-stop com.wanjia.lend"
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 uninstall com.wanjia.lend
> error: Error: Command failed: C:\Windows\system32\cmd.exe /s /c "D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 uninstall com.wanjia.lend"
>
> Exception occurred while executing:
> java.lang.IllegalArgumentException: Unknown package: com.wanjia.lend
> at com.android.server.pm.Settings.isOrphaned(Settings.java:4427)
> at com.android.server.pm.PackageManagerService.isOrphaned(PackageManagerService.java:22820)
> at com.android.server.pm.PackageManagerService.deletePackageVersioned(PackageManagerService.java:19689)
> at com.android.server.pm.PackageInstallerService.uninstall(PackageInstallerService.java:745)
> at com.android.server.pm.PackageManagerShellCommand.runUninstall(PackageManagerShellCommand.java:929)
> at com.android.server.pm.PackageManagerShellCommand.onCommand(PackageManagerShellCommand.java:134)
> at android.os.ShellCommand.exec(ShellCommand.java:96)
> at com.android.server.pm.PackageManagerService.onShellCommand(PackageManagerService.java:23128)
> at android.os.Binder.shellCommand(Binder.java:597)
> at android.os.Binder.onTransact(Binder.java:495)
> at android.content.pm.IPackageManager$Stub.onTransact(IPackageManager.java:2671)
> at com.android.server.pm.PackageManagerService.onTransact(PackageManagerService.java:3927)
> at android.os.Binder.execTransact(Binder.java:700)
>
> at ChildProcess.exithandler (child_process.js:751:12)
> at ChildProcess.emit (events.js:110:17)
> at maybeClose (child_process.js:1016:16)
> at Process.ChildProcess._handle.onexit (child_process.js:1088:5)
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "pm install -r /data/local/tmp/5487d3a12a3d1e947f77f8b43119db85.apk"
> info: [debug] Forwarding system:4724 to device:4724
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 forward tcp:4724 tcp:4724
> info: [debug] Pushing appium bootstrap to device...
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 push "D:\\Appium\\node_modules\\appium\\build\\android_bootstrap\\AppiumBootstrap.jar" /data/local/tmp/
> info: [debug] Pushing settings apk to device...
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 install "D:\Appium\node_modules\appium\build\settings_apk\settings_apk-debug.apk"
> info: [debug] Pushing unlock helper app to device...
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 install "D:\Appium\node_modules\appium\build\unlock_apk\unlock_apk-debug.apk"
> info: Starting App
> info: [debug] Attempting to kill all 'uiautomator' processes
> info: [debug] Getting all processes with 'uiautomator'
> info: [debug] executing cmd: D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "ps 'uiautomator'"
> info: [debug] Stopping logcat capture
> info: [debug] Logcat terminated with code null, signal SIGTERM
> info: [debug] Sent shutdown command, waiting for UiAutomator to stop...
> warn: UiAutomator did not shut down fast enough, calling it gone
> info: [debug] Cleaning up android objects
> info: [debug] Cleaning up appium session
> error: Failed to start an Appium session, err was: Error: Command failed: C:\Windows\system32\cmd.exe /s /c "D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "ps 'uiautomator'""
> ps: uiautomator
>
> info: [debug] Error: Command failed: C:\Windows\system32\cmd.exe /s /c "D:\android\android-sdk_r23-windows\android-sdk-windows\platform-tools\adb.exe -s 6bec503d0205 shell "ps 'uiautomator'""
> ps: uiautomator
>
> at ChildProcess.exithandler (child_process.js:751:12)
> at ChildProcess.emit (events.js:110:17)
> at maybeClose (child_process.js:1016:16)
> at Process.ChildProcess._handle.onexit (child_process.js:1088:5)
> info: [debug] Responding to client with error: {"status":33,"value":{"message":"A new session could not be created. (Original error: Command failed: C:\\Windows\\system32\\cmd.exe /s /c \"D:\\android\\android-sdk_r23-windows\\android-sdk-windows\\platform-tools\\adb.exe -s 6bec503d0205 shell \"ps 'uiautomator'\"\"\nps: uiautomator\r\n)","killed":false,"code":1,"signal":null,"cmd":"C:\\Windows\\system32\\cmd.exe /s /c \"D:\\android\\android-sdk_r23-windows\\android-sdk-windows\\platform-tools\\adb.exe -s 6bec503d0205 shell \"ps 'uiautomator'\"\"","origValue":"Command failed: C:\\Windows\\system32\\cmd.exe /s /c \"D:\\android\\android-sdk_r23-windows\\android-sdk-windows\\platform-tools\\adb.exe -s 6bec503d0205 shell \"ps 'uiautomator'\"\"\nps: uiautomator\r\n"},"sessionId":null}
> info: <-- POST /wd/hub/session 500 34082.695 ms - 741

老版本的遗留问题吧，把之前打到真机或者模拟器的app删掉，把你的appium 服务器升级到最新版，还有下次提问题，把你的真机设备、或模拟器版本号，操作的action。详细描述一下。你以为我们是神，开个error就能推断出来~。就是我找到appium的核心开发者，人家也只能给出两个字：“滚蛋~”