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org/datanucleus/exceptions/ClassNotResolvedException : Unsupported major.minor version 52.0
java.lang.UnsupportedClassVersionError: 
org/datanucleus/exceptions/ClassNotResolvedException : Unsupported 
major.minor version 52.0	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:199)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:274)	at javax.jdo.JDOHelper$18.run(JDOHelper.java:2018)	at javax.jdo.JDOHelper$18.run(JDOHelper.java:2016)	at java.security.AccessController.doPrivileged(Native Method)	at javax.jdo.JDOHelper.forName(JDOHelper.java:2015)	at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1162)	at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808)	at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1093)	at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:919)	at com.seekvehic.util.PMF.(PMF.java:8)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:191)	at com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted(RuntimeHelper.java:70)	at com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted(Runtime.java:65)	at com.seekvehic.apiservices.RiderApi.createNewUser(RiderApi.java:38)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:130)	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137)	at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:280)	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:234)	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:221)	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)	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 com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:50)	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$CachedChain.doFilter(ServletHandler.java:1157)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:512)	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$RequestHandler.content(HttpConnection.java:938)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)