GWT-GAE: Error: NOT_FOUND after deploying an app - google-app-engine

Question

I tried to deploy my application, which also stores data in the datastore in app engine. I use the objectify library for accessing the datastore. Locally it runs without problems, and I can acces the admin datastore locally. But when I try to deploy it, although eclipse says that it has been successfully deployed, when I try the url, I get an error: NOT_FOUND.
In the log(in the app engine) there are two warnings:
com.google.api.server.spi.response.ServletResponseResultWriter getWriteObjectifyKeyAsStringModule: Exception while resolving Objectify Key#getString
java.lang.NoSuchMethodException: com.googlecode.objectify.Key.getString()
at com.google.appengine.runtime.Request.process-16096d3fb5bf337e(Request.java)
at java.lang.Class.getMethod(Class.java:216)
at com.google.api.server.spi.response.ServletResponseResultWriter.getWriteObjectifyKeyAsStringModule(ServletResponseResultWriter.java:154)
at com.google.api.server.spi.response.ServletResponseResultWriter.<init>(ServletResponseResultWriter.java:57)
at com.google.api.server.spi.SystemServiceServlet.getResponseWriter(SystemServiceServlet.java:127)
at com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$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)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
at java.lang.Thread.run(Thread.java:679)
and
com.google.api.server.spi.request.ServletRequestParamReader getObjectifyKeyModule: Exception while resolving Objectify Key#create
java.lang.NoSuchMethodException: com.googlecode.objectify.Key.create(java.lang.String)
at com.google.appengine.runtime.Request.process-16096d3fb5bf337e(Request.java)
at java.lang.Class.getMethod(Class.java:216)
at com.google.api.server.spi.request.ServletRequestParamReader.getObjectifyKeyModule(ServletRequestParamReader.java:147)
at com.google.api.server.spi.request.ServletRequestParamReader.<init>(ServletRequestParamReader.java:131)
at com.google.api.server.spi.SystemServiceServlet.getParamReader(SystemServiceServlet.java:122)
at com.google.api.server.spi.SystemServiceServlet.execute(SystemServiceServlet.java:140)
at com.google.api.server.spi.SystemServiceServlet.doPost(SystemServiceServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$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)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
I have 4 rpc methods that look like a lot so I'm going to put an example of one of them:
the greetingService:
#RemoteServiceRelativePath("registration")
public interface GreetingService extends RemoteService {
String greetServer(String email, String pass, String rPass, int job ) throws IllegalArgumentException;
}
the Async:
public interface GreetingServiceAsync {
void greetServer(String email, String pass, String rPass, int job, AsyncCallback<String> callback) throws IllegalArgumentException;
}
and the Impl:
#SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements GreetingService {
static {
ObjectifyService.register(LoginUser.class);
}
public String greetServer(String email, String pass, String rPass, int job) throws IllegalArgumentException {
Objectify ofy = ObjectifyService.begin();
LoginUser user = new LoginUser();
if (!FieldVerifier.isValidName(email)) {
throw new IllegalArgumentException("Name must be at least 4 characters long");
}
if (!FieldVerifier.isValidPass(pass, rPass)) {
throw new IllegalArgumentException("Password and Repeat Password do not match!");
} else {
user.setEmail(email);
user.setPassword(pass);
user.setJob(job);
ofy.put(user);
}
return email;
}
}
Any ideas??

Answer 1

I never found out what the problem was. I just reinstall gwt and gae, created a new project and I was able to deploy it.

Answer 2

I had the same problem. Then I realized that I had objectify-3.0.jar in my war/WEB-INF/lib
The Key.getString() method apparently was added to version 3.1 only, so after I replaced objectify-3.0.jar with objectify-3.1.jar the problem was gone.