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org.hibernate.exception.GenericJDBCException: Cannot open connection - Oracle / Tomcat / localhost

I am writing a simple Hibernate program with Oracle as a database.
I am facing this error and I am not able to get the solution despite many trials.
I have added all hibernate jars & Oracle(ojdbc14.jar)
I have a schema as "test" in Oracle database
The username & password for Oracle is system
I have created the following files:
Student.java - POJO class with fields as rollno, name, address & setters/getters
Student.hbm.xml - Mapping file
Student.cfg.xml - Hibernate Configuration file
Test.java - Driver class
Student.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name = "connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name = "connection.url">jdbc:oracle:thin:#localhost:1521:xe</property>
<property name = "username">system</property>
<property name = "password">system</property>
<property name = "show_sql">true</property>
<property name = "dialect">org.hibernate.dialect.OracleDialect</property>
<property name = "hbm2ddl.auto">update</property>
<mapping resource = "com/alighthub/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Below is the error:
Exception in thread "main" org.hibernate.exception.GenericJDBCException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:420)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at com.alighthub.Test.main(Test.java:16)
Caused by: java.sql.SQLException: invalid arguments in call
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:236)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
... 5 more
Please suggest.

Property for username & password is incorrect in Student.cfg.xml, updated as "connection.username" & "connection.password" as below :-
<property name = "connection.username">system</property>
<property name = "connection.password">system</property>

Connection with MySQL database. Xml error Intellij

I'm trying to connect with my local MySQL database. When im trying to connect via session factory it throws following errror:
INFO: HHH000206: hibernate.properties not found
java.lang.ExceptionInInitializerError
at Main.<clinit>(Main.java:22)
Caused by: org.hibernate.internal.util.config.ConfigurationException: Unable to perform unmarshalling at line number 0 and column 0 in RESOURCE hibernate.cfg.xml. Message: null
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:133)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:65)
at org.hibernate.boot.cfgxml.internal.ConfigLoader.loadConfigXmlResource(ConfigLoader.java:57)
at org.hibernate.boot.registry.StandardServiceRegistryBuilder.configure(StandardServiceRegistryBuilder.java:163)
at org.hibernate.cfg.Configuration.configure(Configuration.java:258)
at org.hibernate.cfg.Configuration.configure(Configuration.java:244)
at Main.<clinit>(Main.java:18)
Caused by: javax.xml.bind.JAXBException
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:241)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:477)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:656)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:599)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:122)
... 6 more
Caused by: java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
at javax.xml.bind.ContextFinder.safeLoadClass(ContextFinder.java:594)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:239)
... 10 more
Exception in thread "main"
Process finished with exit code 1
My main class is generated with persistence mapping
hibernate.cfg.xml file:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<mapping class="entities.AddressEntity"/>
<mapping class="entities.AnimalEntity"/>
<mapping class="entities.OwnerEntity"/>
</session-factory>
</hibernate-configuration>
I generated classes and .xml file via persistence mapping option in intelliJ. Thanks in advance for a quick response.

Hibernate: no persistent classes found for query class but mapping is correct

This question has been asked many times, but I have not encountered a solution for my problem as on first sight everything seems right. It is a configuration problem when using this Hibernate setup:
hibernate-core: 5.2.11.Final
hibernate-jpa-2.1-api: 1.0.0.Final
hibernate-commons-annotations: 5.0.1.Final
When I try to execute a query I get a warning in the console that says no persistent classes found for query class but no error is thrown, and no data is retrieved from database although it should return over 30 entries.
09:56:58,203 INFO [org.hibernate.Version] (default task-46) HHH000412: Hibernate Core {5.2.11.Final}
09:56:58,206 INFO [org.hibernate.cfg.Environment] (default task-46) HHH000206: hibernate.properties not found
09:56:58,348 INFO [org.hibernate.annotations.common.Version] (default task-46) HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
09:56:58,397 WARN [org.hibernate.orm.connections.pooling] (default task-46) HHH10001002: Using Hibernate built-in connection pool (not for production use!)
09:56:58,398 INFO [org.hibernate.orm.connections.pooling] (default task-46) HHH10001005: using driver [com.mysql.cj.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/db_motor?useSSL=false&autoReconnect=true]
09:56:58,398 INFO [org.hibernate.orm.connections.pooling] (default task-46) HHH10001001: Connection properties: {user=admin, password=****}
09:56:58,398 INFO [org.hibernate.orm.connections.pooling] (default task-46) HHH10001003: Autocommit mode: false
09:56:58,400 INFO [org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl] (default task-46) HHH000115: Hibernate connection pool size: 10 (min=1)
09:56:58,647 INFO [org.hibernate.dialect.Dialect] (default task-46) HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
09:56:58,958 WARN [org.hibernate.hql.internal.QuerySplitter] (default task-46) HHH000183: no persistent classes found for query class: SELECT respuestas FROM mr.hibernate.beans.MR_RespuestasHBean respuestas
09:56:58,959 INFO [org.hibernate.hql.internal.QueryTranslatorFactoryInitiator] (default task-46) HHH000397: Using ASTQueryTranslatorFactory
It seems the warning about hibernate.properties not found is not of any influence if I interpret information found on this website correctly.
The hibernate.cfg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory name="session_factory">
<property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
<property name="connection.password">admin</property>
<property name="connection.pool_size">10</property> <!-- not for production -->
<property name="connection.url">jdbc:mysql://localhost:3306/db_motor?useSSL=false&autoReconnect=true</property>
<property name="connection.username">admin</property>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.use_sql_comments">true</property>
<mapping class="mr.hibernate.beans.MR_RespuestasHBean"/>
</session-factory>
</hibernate-configuration>
The mapped class:
package mr.hibernate.beans;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "t_respuestas")
public class MR_RespuestasHBean implements Serializable {
private static final long serialVersionUID = 3892055031093758454L;
#Id
#Column(name = "COD_RESPUESTA", nullable = false, length = 11)
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long codigoRespuesta;
public Long getCodigoRespuesta() {
return codigoRespuesta;
}
public void setCodigoRespuesta(Long codigoRespuesta) {
this.codigoRespuesta = codigoRespuesta;
}
}
Table definition:
CREATE TABLE t_respuestas
(
COD_RESPUESTA int PRIMARY KEY NOT NULL
)
;
CREATE UNIQUE INDEX PRIMARY ON t_respuestas(COD_RESPUESTA)
;
The code used to get the query is this:
session = getSession(HibernateUtil.configurationFileMySql);
session.beginTransaction();
StringBuffer hql = new StringBuffer();
StringBuffer select = new StringBuffer();
select.append("SELECT respuestas");
StringBuffer from = new StringBuffer();
from.append(" FROM "+ MR_RespuestasHBean.class.getName() +" respuestas");
hql.append(select);
hql.append(from);
#SuppressWarnings("unchecked")
Query<MR_RespuestasHBean> query = session.createQuery(hql.toString());
listado = query.list();
If I change MR_RespuestasHBean.class.getName() by MR_RespuestasHBean.class.getSimpleName(), an error is thrown:
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: MR_RespuestasHBean is not mapped
Some information on the environment:
JBoss EAP7
JDK8
MySql connector 6.0.6
The Hibernate part is in an EJB3 project
However, when using this setup, everything works well (logically, session loading and query execution has to be different):
hibernate-core: 4.2.0.Final
hibernate-jpa-2.0-api: 1.0.1.Final
hibernate-commons-annotations: 4.0.1.Final
Any clues on what is causing the problem is very much appreciated.

Mapping an java object to a database

I am tring to map a java object to database(i am using postgres). when i am runnig the java file (HibernateTest.java) it is showing lot of errors. i think all thing are correct. but i am doubtfull in my eclipse,bcoz it is not supporting xml ( i mean it is not showing color, it is not taking xml file as a know file ). i am a beginner so i cant understand them. plz suggest me.
hibernate.cfg.xml file
<?xml version='1.0' encoding='utf-8'?>
<hibernate-configuration
xmlns="http://www.hibernate.org/xsd/hibernate-configuration"
xsi:schemaLocation="http://www.hibernate.org/xsd/hibernate-configuration hibernate-configuration-4.0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:hsqldb:hsql://localhost:5432/hibernatedb</property>
<property name="connection.username">postgres</property>
<property name="connection.password">hkm#1160</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.PostgreSQlDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
<mapping resource="org.hibernate.hemant.dto.UDestails"/>
</session-factory>
</hibernate-configuration>
UserDetails.java file
package org.hibernate.hemant.dto;
import javax.persistence.Entity;
import javax.persistence.Id;
#Entity
public class UserDetails
{
#Id
private int userID;
private String userName;
public int getUserID() {
return userID;
}
public void setUserID(int userID) {
this.userID = userID;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
my main java file HibernateTest.java
package org.hemant.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.hemant.dto.UserDetails;
public class HibernateTest {
/**
* #param args
*/
public static void main(String[] args) {
UserDetails user = new UserDetails();
user.setUserID(1);
user.setUserName("First user");
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session session = sessionFactory.openSession();
session.beginTransaction();
session.save(user);
session.beginTransaction().commit();
}
}
There are the errors......
Apr 13, 2016 9:26:08 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.1.0.Final}
Apr 13, 2016 9:26:08 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Apr 13, 2016 9:26:08 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassistException in thread "main"
Exception in thread "main" org.hibernate.internal.util.config.ConfigurationException: Unable to perform unmarshalling at line number 13 and column 63 in RESOURCE hibernate.cfg.xml. Message: cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:133)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:65)
at org.hibernate.boot.cfgxml.internal.ConfigLoader.loadConfigXmlResource(ConfigLoader.java:57)
at org.hibernate.boot.registry.StandardServiceRegistryBuilder.configure(StandardServiceRegistryBuilder.java:163)
at org.hibernate.cfg.Configuration.configure(Configuration.java:259)
at org.hibernate.cfg.Configuration.configure(Configuration.java:245)
at org.hemant.hibernate.HibernateTest.main(HibernateTest.java:15)
Caused by: javax.xml.bind.UnmarshalException
- with linked exception:
[org.xml.sax.SAXParseException; lineNumber: 13; columnNumber: 63; cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.]
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(Unknown Source)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:126)
... 6 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 13; columnNumber: 63; cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.startElement(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.ValidatingUnmarshaller.startElement(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXEventConnector.handleStartElement(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXEventConnector.bridge(Unknown Source)
... 9 more

The cause of exception is an incorrect hibernate.cfg.xml file.
Please, use this structure
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
...
<mapping class="org.hibernate.hemant.dto.UDestails" />
</session-factory>
</hibernate-configuration>
You incorrect specify a persistent class in hibernate.cfg.xml. You use a mapping with annotations so you need to map a class not a resource
<mapping class="org.hibernate.hemant.dto.UDestails" />
Please, don't forget to close a session and sessionFactory.

WARN: SQL Error: 1064, SQLState: 42000

I have a problem with hibernate query.
UPDATE:
When I use this query it works like a charm:
public static List<Korisnik> UzmiSveKorisnike()
{
EntityManager em = Konekcija.getEmf().createEntityManager();
TypedQuery<Korisnik> q = em.createQuery("select k from Korisnik k where k.isActive = 1", Korisnik.class);
List<Korisnik> resultList = q.getResultList();
em.close();
return resultList;
}
But when I use one listed below, to select single result (like for login)...
I get this error: WARN: SQL Error: 1064, SQLState: 42000
I have tried variety of ways to implement this query, but without success. I will list them at the end of the post.
This is the code:
public static Korisnik ProvjeraKorisnickihPodataka(String kIme, String kLozinka)
{
EntityManager em = Konekcija.getEmf().createEntityManager();
{
TypedQuery<Korisnik> q = em.createQuery("select k from Korisnik k where k.isActive = 1 AND k.korisnickoIme=:ime AND k.lozinka =:lozinka", Korisnik.class);
q.setParameter("ime", kIme);
q.setParameter("lozinka", kLozinka);
Korisnik provjeren = q.getSingleResult();
em.close();
return provjeren;
Even if I replace :ime and :lozinka with actual data like "k.korisnickoIme='msbtest' and k.lozinka = 'msbtest'" I get the same error.
Your help is appreciated.
Thank you!
Complete stack:
Hibernate: select TOP(?) korisnik0_.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, korisnik0_.ime as ime11_, korisnik0_.isActive as isActive11_, korisnik0_.kontakt as kontakt11_, korisnik0_.korisnickoIme as korisnic5_11_, korisnik0_.lozinka as lozinka11_, korisnik0_.prezime as prezime11_, korisnik0_.rola_RolaID as rola9_11_ from Korisnik korisnik0_ where korisnik0_.isActive=1 and korisnik0_.korisnickoIme=? and korisnik0_.lozinka=?
Jul 05, 2013 11:45:22 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1064, SQLState: 42000
Jul 05, 2013 11:45:22 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1377)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1300)
at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:318)
at Servis.LoginServis.ProvjeraKorisnickihPodataka(LoginServis.java:35)
at UI.LogInFrm.do_btnPrijava_widgetSelected(LogInFrm.java:173)
at UI.LogInFrm$1.widgetSelected(LogInFrm.java:121)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at UI.LogInFrm.main(LogInFrm.java:44)
Caused by: org.hibernate.exception.SQLGrammarException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:82)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:129)
at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81)
at com.sun.proxy.$Proxy10.executeQuery(Unknown Source)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1926)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1727)
at org.hibernate.loader.Loader.doQuery(Loader.java:852)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:293)
at org.hibernate.loader.Loader.doList(Loader.java:2411)
at org.hibernate.loader.Loader.doList(Loader.java:2397)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2227)
at org.hibernate.loader.Loader.list(Loader.java:2222)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1247)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:285)
... 9 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.KorisnikID as KorisnikID11_, korisnik0_.agencija_AgencijaID as agencija8_11_, k' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122)
... 25 more
mapping goes like this:
/**
** Class Korisnik
**/
#Entity
public class Korisnik implements Serializable {
//Fields
#Id
#GeneratedValue
private Integer KorisnikID;
private String ime;
private String prezime;
private String kontakt;
private String korisnickoIme;
private String lozinka;
private Boolean isActive;
#JoinColumn(nullable = false)
#ManyToOne
private Agencija agencija;
#JoinColumn(nullable = false)
#ManyToOne
private Rola rola;
and getters and setters go...
OK, my persistence.xml file looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="MojaOznaka1" transaction-type="RESOURCE_LOCAL">
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<!-- Podaci o bazi podataka -->
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://xxxxxxxxx.xxxxxxxxx.xxx/xxxxxxxxx/" />
<property name="javax.persistence.jdbc.user" value="xxxxxx" />
<property name="javax.persistence.jdbc.password" value="xxxxxx" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<!-- hiberante dialect -->
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServer2008Dialect" />
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size" value="1" />
<!-- Ispis SQL koda u konzolu -->
<property name="hibernate.show_sql" value="true" />
<!-- formatiranje SQL koda ispisanog u konzolni prozor -->
<property name="hibernate.format_sql" value="false" />
<!-- Vrijednost "update" kreira tabele ako nepostoje -->
<!-- <property name="hibernate.hbm2ddl.auto" value="update" /> -->
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class" value="thread" />
<!-- Disable the second-level cache -->
<property name="cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
<!-- automatsko prepoznavanje JPA klasa -->
<property name="hibernate.archive.autodetection" value="class, hbm" />
</properties>
</persistence-unit>
</persistence>
OK, now what???

The query output you give suggests you told Hibernate to generate SQL for a MS-SQL Server (using TOP(1) to fetch the topmost row).
Since you're using a mysql database as a backend, that won't work. Try adding
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
to your persistence.xml or wherever you configure JPA.
As #Secko mentions in the comment, omitting the dialect altogether might even select a better (more specific) one.

This error usually indicates some mapping error. Are all fields used in the where are actually fields of the "Korisnik" class? HQL uses the field names and not the column names from the database.