感谢斯科特的提示，我确实第二次下载了它并确保大小如您所说：
C:\Users>a127 usergrid download
Downloading Usergrid and Portal as needed...
..............................................................................do
wnloaded
- 'C:\Users\sgs\.a127\usergrid\usergrid-launcher-0.0.29.jar'
- 'C:\Users\sgs\.a127\usergrid\usergrid-portal-2.0.16\usergrid-port
al\index.html'
C:\Users>cd sgs\.a127\usergrid
C:\Users\sgs\.a127\usergrid>dir
Volume in drive C is OSDisk
Volume Serial Number is 1864-0DEB
Directory of C:\Users\sgs\.a127\usergrid
11/30/2014 11:34 AM <DIR> .
11/30/2014 11:34 AM <DIR> ..
**11/30/2014 11:34 AM 48,581,037 usergrid-launcher-0.0.29.jar**
11/30/2014 11:33 AM <DIR> usergrid-portal-2.0.16
11/30/2014 11:34 AM 2,029,158 usergrid-portal-2.0.16.tar.gz
2 File(s) 50,610,195 bytes
3 Dir(s) 336,509,812,736 bytes free
但是，当我在那之后尝试启动 usergrid 时，它会在启动时抛出一条消息，表明它无法启动，尽管 Jetty 似乎已经启动：
C:\Users\sgs\.a127\usergrid>a127 usergrid start
starting...
timeout
failed to start. Log tail:
INFO: Registering Spring bean, rootResource, of type org.apache.usergrid.rest.Ro
otResource as a root resource class
Nov 30, 2014 11:35:52 AM com.sun.jersey.spi.spring.container.SpringComponentProv
iderFactory registerSpringBeans
INFO: Registering Spring bean, systemResource, of type org.apache.usergrid.rest.
SystemResource as a root resource class
Nov 30, 2014 11:35:52 AM com.sun.jersey.spi.spring.container.SpringComponentProv
iderFactory registerSpringBeans
INFO: Registering Spring bean, propertiesResource, of type org.apache.usergrid.r
est.test.PropertiesResource as a root resource class
Nov 30, 2014 11:35:52 AM com.sun.jersey.server.impl.application.WebApplicationIm
pl _initiate
INFO: Initiating Jersey application, version 'Jersey: 1.18 11/22/2013 01:21 AM'
Nov 30, 2014 11:35:53 AM org.glassfish.grizzly.http.server.HttpServer start
INFO: [HttpServer] Started.
C:\Users\sgs\.a127\usergrid>a127 usergrid portal
Usergrid doesn't appear to be running. Run with --start option or execute 'a127
usergrid start' first.
您以前见过这个以及关于如何确保 usergrid 启动的任何想法吗？
-S