[appengine-java] Problem starting development after adding backends.xml

[Rick Mangi]

After adding a backends.xml file to my application I'm no longer able
to startup my development environment. Has anybody seen this before?
Removing the file clears everything up, but I really need to get a
backend running :-)

 [ERROR] Unable to start App Engine server
java.lang.ClassCastException:
com.google.appengine.tools.appstats.Recorder cannot be cast to
com.google.appengine.tools.development.ApiProxyLocal
Unable to start embedded HTTP server
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)
        at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
235)
        at com.google.appengine.tools.development.BackendServers
$ServerWrapper.startup(BackendServers.java:816)
        at
com.google.appengine.tools.development.BackendServers.startupAll(BackendServers.java:
304)
        at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
155)
        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)
[ERROR] shell failed in doStartupServer method

I don't see anything wrong with my backends.xml -->

<backends>
        <backend name="thumbnailservicebatchoptimize">
                <class>B2</class>
                <instances>1</instances>
                <options>
                    <dynamic>true</dynamic>
                        <fail-fast>true</fail-fast>
                        <public>true</public>
                </options>
        </backend>
</backends>

Thanks for any help!

Rick Mangi

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