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javax.servlet.FilterChain is a restricted class. Please see the Google App Engine developer's guide for more details. at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:52) at
java.lang.NoClassDefFoundError: javax.servlet.FilterChain is a restricted 
 class. Please see the Google  App Engine developer's guide for more details.
 at 
 com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:52)
 at 
 com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
 at 
 org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at 
 com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
 at 
 org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at 
 com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
 at 
 com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
 at 
 com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
 at 
 org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
 at 
 org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
 at 
 org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
 at 
 org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
 at 
 org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)