cloudfoundry 创建新的app 成功，但是启动老是失败，求大神帮忙看看什么原因.

创建过程：

Shaman[[[[[[[[[[[[[[[[[@SHAMAN-PC](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC)](/user/SHAMAN-PC) /e/cloudfoundry/testapp

$ vmc push

Would you like to deploy from the current directory? [Yn]: y

Application Name: testapp

Detected a Node.js Application, is this correct? [Yn]: y

Application Deployed URL [testapp.cloudfoundry.com]: shaman.cloudfoundry.com

Memory reservation (128M, 256M, 512M, 1G, 2G) [64M]: 1G

How many instances? 1:

Create services to bind to 'testapp'? [yN]: y

1: mongodb

2: mysql

3: postgresql

4: rabbitmq

5: redis

What kind of service?: 2

Specify the name of the service [mysql-a8398]:

Create another? [yN]: n

Would you like to save this configuration? [yN]: y

Manifest written to manifest.yml.

Creating Application: OK

Creating Service [mysql-a8398]: OK

Binding Service [mysql-a8398]: OK

Uploading Application:

Checking for available resources: OK

Processing resources: OK

Packing application: OK

Uploading (11K): OK

Push Status: OK

Staging Application 'testapp': OK

Starting Application 'testapp': ..........................

Error: Application [testapp] failed to start, logs information below.

====> /logs/stdout.log <====

Express server listening on port 3000 in development mode

Delete the application? [Yn]: n

最后在 start 出错了 ， 然后我重新启动的时候提示 already started , 查看了app状态 如下：

什么原因 ， 初学nodejs 和使用cloudfoundry ，请教什么原因