Question

This is the error I recieve. When I revert to using 6u30, it works fine. AppEngine must be updated now to fix this bug.

Initializing App Engine server
   [ERROR] Unable to start App Engine server
Unable to start embedded HTTP serverjava.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
[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)

Answer 1

This is a known bug: http://code.google.com/p/googleappengine/issues/detail?id=6928

Workaround is to add this line to your run config:

-Dappengine.user.timezone=UTC

For some people it must be:

-Dappengine.user.timezone.impl=UTC

Seems that the latter works if GWT is included; if you don’t use GWT along with GAE, then use the former.