UnsupportedClassVersionError: org/datanucleus/exceptions/ClassNotResolvedException : Unsupported major.minor version 52.0

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Srinivas Gs

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Jul 19, 2016, 4:55:53 AM7/19/16

to Google App Engine

Hey there,

I am getting following exception when I try to persist table into the data store using PMF, I am using Maven with Resteasy framework

code :

@POST

@Path("/**********")

@Consumes("*/*")

@Produces(MediaType.APPLICATION_JSON)

public Response createNewUser(Rider userobject){

RiderServices userService = new RiderServices();

PersistenceManager pm = PMF.get().getPersistenceManager();

Response res = null;

try{

System.out.println(userService.checkUserEmail(userobject.getEmailId()));

if(!userService.checkUserEmail(userobject.getEmailId())) //If user does not exist already.

{

System.out.println("getjsonString ::: "+ userobject);

userobject.setDateAdded(new Date());

userobject.setisDeleted(false);

userobject.setCountry("US");

userobject.setEmailAlerts(true);

userobject.setLoginType("mobile");

userobject.setPassWord(EncryptionUtil.encrypt(userobject.getPassWord()));

pm.makePersistent(userobject);

res = responseString("Rider Created","method success");

}

else{

System.out.println("else condition");

res = responseString("Sorry! Email Id already exists. ","failure");

}

catch(Exception e){

System.out.println(e.getMessage());

}

finally{

pm.close();

}

return res;

}

PMF.java

package com.seekvehic.util;

import javax.jdo.JDOHelper;

import javax.jdo.PersistenceManagerFactory;

public final class PMF {

private static final PersistenceManagerFactory pmfInstance =

JDOHelper.getPersistenceManagerFactory("transactions-optional");

private PMF() {}

public static PersistenceManagerFactory get() {

return pmfInstance;

}

maven dependencies :

<groupId>org.datanucleus</groupId>

<artifactId>datanucleus-api-jdo</artifactId>

</dependency>

<groupId>javax.jdo</groupId>

</dependency>

<groupId>org.datanucleus</groupId>

<artifactId>datanucleus-jpa</artifactId>

</dependency>

<groupId>org.datanucleus</groupId>

<artifactId>datanucleus-core</artifactId>

</dependency>

<groupId>javax.persistence</groupId>

<artifactId>persistence-api</artifactId>

</dependency>

Exception;

org.jboss.resteasy.spi.UnhandledException: java.lang.UnsupportedClassVersionError: org/datanucleus/exceptions/ClassNotResolvedException : Unsupported major.minor version 52.0

at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:76)

at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:212)

at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:149)

at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:372)

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)