appium 报错

2018-11-27 18:05:56:313 - [Logcat] Logcat terminated with code 0, signal null

2018-11-27 18:05:56:314 - [UiAutomator] UiAutomator exited unexpectedly with code 0, signal null

2018-11-27 18:05:56:314 - [debug] [UiAutomator] Moving to state 'stopped'

Unhandled rejection Error: UiAUtomator shut down unexpectedly

    at AndroidBootstrap.callee$2$0$ (/usr/local/lib/node_modules/appium/node_modules/_appium-android-bootstrap@3.0.0@appium-android-bootstrap/lib/bootstrap.js:187:42)

    at tryCatch (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:67:40)

    at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:315:22)

    at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:100:21)

    at invoke (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:136:37)

    at enqueueResult (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:185:17)

    at new Promise (<anonymous>)

    at new F (/usr/local/lib/node_modules/appium/node_modules/_core-js@1.2.7@core-js/library/modules/$.export.js:30:36)

    at AsyncIterator.enqueue (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:184:12)

    at AsyncIterator.prototype.(anonymous function) [as next] (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:100:21)

    at Object.runtime.async (/usr/local/lib/node_modules/appium/node_modules/_babel-runtime@5.8.24@babel-runtime/regenerator/runtime.js:209:12)

    at UiAutomator.callee$2$0 (/usr/local/lib/node_modules/appium/node_modules/_appium-android-bootstrap@3.0.0@appium-android-bootstrap/build/lib/bootstrap.js:356:42)

    at emitOne (events.js:116:13)

    at UiAutomator.emit (events.js:211:7)

    at UiAutomator.changeState (/usr/local/lib/node_modules/appium/node_modules/_appium-android-bootstrap@3.0.0@appium-android-bootstrap/lib/uiautomator.js:87:10)

    at SubProcess.<anonymous> (/usr/local/lib/node_modules/appium/node_modules/_appium-android-bootstrap@3.0.0@appium-android-bootstrap/lib/uiautomator.js:47:14)

    at emitTwo (events.js:126:13)

    at SubProcess.emit (events.js:214:7)

    at ChildProcess.<anonymous> (/usr/local/lib/node_modules/appium/node_modules/_teen_process@1.13.1@teen_process/lib/subprocess.js:136:14)

    at emitTwo (events.js:126:13)

    at ChildProcess.emit (events.js:214:7)

    at Process.ChildProcess._handle.onexit (internal/child_process.js:198:12)