Unable to start app engine server

[Jasonz]

I just installed the GWT 1.6.3 eclipse plugins, but when I tried to
start app engine server, I got following exceptions:


Initializing App Engine server
[ERROR] Unable to start App Engine server
java.lang.RuntimeException: Unable to restore the previous TimeZone
at
com.google.appengine.tools.development.DevAppServerImpl.restoreLocalTimeZone(DevAppServerImpl.java:
228)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
164)
at
com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:
97)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: java.lang.NoSuchFieldException: defaultZoneTL
at java.lang.Class.getDeclaredField(Unknown Source)
at
com.google.appengine.tools.development.DevAppServerImpl.restoreLocalTimeZone(DevAppServerImpl.java:
222)
... 6 more
Unable to start embedded HTTP server[ERROR] shell failed in
doStartupServer method

com.google.gwt.core.ext.UnableToCompleteException: (see previous log
entries)
at
com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:
102)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)