>> xctest-client.js:272:14 [master] pid:2489 killing runnerProc pid: 3768
>> xctest-client.js:278:14 [master] pid:2489 killing iproxyProc pid: 3767
>> xctest-client.js:181:14 [master] pid:2489 xctest client exit with code: 65, signal: null
>> xctest-client.js:145:16 [master] pid:2489 deviceconsole exit with code: null, signal: SIGKILL
>> xctest-client.js:255:14 [master] pid:2489 Fail to start xctest: undefined
>> responseHandler.js:54:12 [master] pid:2489 Send Error Respone to Client: undefined

  InternalServerError: Internal Server Error
      at Object.throw (/Users/degongmeng/.nvm/versions/node/v6.9.5/lib/node_modules/macaca-cli/node_modules/koa/lib/context.js:91:23)
      at Object.module.exports (/Users/degongmeng/.nvm/versions/node/v6.9.5/lib/node_modules/macaca-cli/node_modules/webdriver-server/lib/server/responseHandler.js:57:17)
      at throw (native)
      at onRejected (/Users/degongmeng/.nvm/versions/node/v6.9.5/lib/node_modules/macaca-cli/node_modules/co/index.js:81:24)
      at process._tickCallback (internal/process/next_tick.js:103:7)

>> xctest-client.js:209:14 [master] pid:2489 iproxy exit with code: null, signal: SIGKILL