[appengine-java] i can't understand why this simple code doens't work on local and app engine.

[배현규]

package test06;

import java.io.IOException;

import javax.servlet.http.*;

import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

//-XX:-UseSplitVerifier

@SuppressWarnings("serial")
public class TEST06Servlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
        if (user != null) {
            resp.setContentType("text/html");
            resp.getWriter().println("Hello, " + user.getNickname());
            resp.getWriter().println("<a href=\"" + 
userService.createLogoutURL(req.getRequestURI()) + "\">logout</a>");
        } else {
            
resp.sendRedirect(userService.createLoginURL(req.getRequestURI()));
        }

} // doGet
} // class






code is simple. but when run this on local, app engine
both occured error. error messages are here.




HTTP ERROR 500

Problem accessing /test06. Reason:

    Expecting a stackmap frame at branch target 98 in method 
test06.TEST06Servlet.doGet(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V
 at offset 14

Caused by:

java.lang.VerifyError: Expecting a stackmap frame at branch target 98 in method 
test06.TEST06Servlet.doGet(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V
 at offset 14
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
        at java.lang.Class.getConstructor0(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
        at 
org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
        at 
org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
        at 
com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
        at 
org.mortbay.jetty.servlet.ServletHandler$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 
com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:78)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at 
com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:362)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at 
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

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*when i add*
*-XX:-UseSplitVerifier*
*at the end of VM argument, local server does work. but app engine still 
didn't...*
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*why this error continuesly occured?*





















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