Problem

WARNING: Failed startup of context com.google.apphosting.utils.jetty.DevAppEngineWebAppContext java.util.zip.ZipException: error in opening zip file

HTTP ERROR: 503

SERVICE_UNAVAILABLE
RequestURI=/T1.html

Powered by jetty://
http://localhost:8080/T1.html
Jul 3, 2009 10:58:46 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: Failed startup of context com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@32df24{/,/Volumes/TRASCEND/docs/neil/Research/GroupFormation/code/GAE/t1/war}
java.util.zip.ZipException: error in opening zip file
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(ZipFile.java:203)
	at java.util.jar.JarFile.<init>(JarFile.java:132)
	at java.util.jar.JarFile.<init>(JarFile.java:97)
	at org.mortbay.jetty.webapp.TagLibConfiguration.configureWebApp(TagLibConfiguration.java:171)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1215)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
	at org.mortbay.jetty.Server.doStart(Server.java:217)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
	at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:147)
	at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:116)
	at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:211)
	at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:86)
	at com.google.gwt.dev.HostedMode.doStartUpServer(HostedMode.java:365)
	at com.google.gwt.dev.HostedModeBase.startUp(HostedModeBase.java:590)
	at com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:397)
	at com.google.gwt.dev.HostedMode.main(HostedMode.java:232)
The server is running at http://localhost:8080/
2009-07-03 19:58:46.975 java[3373:80f] [Java CocoaComponent compatibility mode]: Enabled
2009-07-03 19:58:46.976 java[3373:80f] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000
SCFinderPlugin(114): Unable to get bundle identifier.SCFinderPlugin(114): Unable to get bundle identifier.SCFinderPlugin(114): Unable to get bundle identifier.

Solution

It seems to be caused by "._" (dot underscore) files created by OSX when a non osx partition is used
I have created the project on the mac partition and to my surprise it fixed the problem
(so much for paying premium for an increased productivity on mac)