Develop Reference

Unable to acquire JDBC Connection in spring hibernate annotation based configuration

I have spring java based configuration.
HibernateConfiguration
package com.app.surveyapp.configuration;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;
#Configuration
#ComponentScan({ "com.app.surveyapp.configuration" })
#PropertySource(value = { "classpath:application.properties" })
public class HibernateConfiguration {
private static final Logger logger = Logger.getLogger(HibernateConfiguration.class);
#Autowired
private Environment environment;
#Bean
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setPackagesToScan(new String[] { "com.app.surveyapp.models" });
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
#Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
return dataSource;
}
private Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
properties.put("hbm2ddl.auto", environment.getRequiredProperty("hbm2ddl.auto"));
return properties;
}
}
DAO
#Repository
public class UserDao implements IUserDao {
private static Logger logger = Logger.getLogger(User.class);
#Autowired
private SessionFactory sessionFactory;
#Override
public User create(User user) {
Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();
Long id = (Long) session.save(user);
tx.commit();
session.close();
return findById(id);
}
}
I am trying to execute create() which is present in DAO file. but at the time of execution i am getting error at Transaction tx = session.beginTransaction();. below is the exception i am getting
Exception
org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:109)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:227)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:234)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:214)
at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:52)
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1525)
at com.app.surveyapp.dao.UserDao.create(UserDao.java:37)
at com.app.surveyapp.bo.UserBo.create(UserBo.java:101)
at com.app.surveyapp.controller.UserController.create(UserController.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.ConnectionImpl.configureClientCharacterSet(ConnectionImpl.java:1734)
at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3539)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2151)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:284)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:208)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:153)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:144)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:155)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:120)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:386)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:84)

Posting this for completeness and clarification of the question, in case others run into this problem (basically a recap of the comments above).
The DB being used was MySQL 8.0 and the problem was caused by an outdated mysql-connector-java.
As suggested in this answer, the solution was to update the connector.

It seems as if the Character-Set of your database and you java application are somehow not compatible.
It seems to be a known issue with MySQL, as you may see here: java.sql.SQLException: Unknown initial character set index '255' received from server for connector 8.0.11
But there are probably similar issues with other DBMS as well.
In Addition you may change the characterEncoding "java-side" as you can see in the stacktrace:
Caused by: java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.

unknown service requested exception with hibernate

Throwing unknown service Exception while opening session in getCourses method in DAO implementation.it works fine when it gets input from backend but when I call it from UI it is throwing this exception
hibernate.cfg.xml
`
<!-- hibernate dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:#10.123.79.59:1521:georli04</property>
<property name="hibernate.connection.username">username</property>
<property name="hibernate.connection.password">password</property>
<property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<!-- Automatic schema creation (begin) === -->
<property name="hibernate.hbm2ddl.auto">none</property>
<!-- Simple memory-only cache -->
<property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<mapping class="com.infy.entity.StudentEntity"/>
<mapping class="com.infy.entity.CourseEntity"/>
`
DAO implementation Exception occurs when we try to open session in getCourses method
public class StudentDAOImpl implements StudentDAO {
public Student getStudentDetails(String studentId) throws Exception {
SessionFactory sessionFactory = null;
Session session = null;
Student student = null;
try {
sessionFactory = HibernateUtility.createSessionFactory();
session = sessionFactory.openSession();
StudentEntity se = (StudentEntity) session.get(StudentEntity.class,
studentId);
if (se != null) {
student = new Student();
student.setStudentId(se.getStudentId());
student.setDateOfBirth(se.getDateOfBirth());
System.out.println(se.getDateOfBirth());
student.setStudentName(se.getStudentName());
System.out.println(se.getStudentName());
student.setBranch(se.getBranch());
student.setSem(se.getSem());
student.setEmail(se.getEmail());
}
} catch (HibernateException exception) {
exception.printStackTrace();
DOMConfigurator.configure("src/resources/log4j.xml");
Logger logger = Logger.getLogger(this.getClass());
logger.error(exception.getMessage(), exception);
throw new Exception("DAO.TECHNICAL_ERROR");
} catch (Exception exception) {
exception.printStackTrace();
DOMConfigurator.configure("src/resources/log4j.xml");
Logger logger = Logger.getLogger(this.getClass());
logger.error(exception.getMessage(), exception);
throw exception;
} finally {
if (session.isOpen() || session != null) {
session.close();
}
}
return student;
}
#SuppressWarnings("unchecked")
public List<Course> getCourses(int semester) throws Exception {
SessionFactory sessionFactory = HibernateUtility.createSessionFactory();
Session session = null;
List<CourseEntity> courseEntities = new LinkedList<CourseEntity>();
List<Course> courses = new LinkedList<Course>();
String hql = "from CourseEntity ce where ce.semester='" + semester
+ "'";
try {
System.out.println("before session");
session = sessionFactory.openSession();
System.out.println("after session");
Query q = session.createQuery(hql);
courseEntities = q.list();
if (courseEntities.isEmpty())
System.out.println("empty");
for (CourseEntity i : courseEntities) {
Course course = new Course();
course.setCourseId(i.getCourseId());
course.setCourseName(i.getCourseName());
course.setCourseType(i.getCourseType());
course.setSemester(i.getSemester());
course.setBranch(i.getBranch());
courses.add(course);
}
} catch (HibernateException exception) {
exception.printStackTrace();
DOMConfigurator.configure("src/resources/log4j.xml");
Logger logger = Logger.getLogger(this.getClass());
logger.error(exception.getMessage(), exception);
throw new Exception("DAO.TECHNICAL_ERROR");
} catch (Exception exception) {
exception.printStackTrace();
DOMConfigurator.configure("src/resources/log4j.xml");
Logger logger = Logger.getLogger(this.getClass());
logger.error(exception.getMessage(), exception);
throw exception;
}finally {
if (session.isOpen() || session != null)
session.close();
}
return courses;
}
exception
org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.engine.jdbc.connections.spi.ConnectionProvider]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:201)
at org.hibernate.internal.AbstractSessionImpl.getJdbcConnectionAccess(AbstractSessionImpl.java:341)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.<init>(JdbcCoordinatorImpl.java:114)
at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.<init>(TransactionCoordinatorImpl.java:89)
at org.hibernate.internal.SessionImpl.<init>(SessionImpl.java:258)
at org.hibernate.internal.SessionFactoryImpl$SessionBuilderImpl.openSession(SessionFactoryImpl.java:1589)
at org.hibernate.internal.SessionFactoryImpl.openSession(SessionFactoryImpl.java:999)
at com.infy.dao.StudentDAOImpl.getCourses(StudentDAOImpl.java:74)
at com.infy.service.StudentServiceImpl.getListOfCourses(StudentServiceImpl.java:73)
at com.infy.api.RegistrationAPI.getCoursesList(RegistrationAPI.java:38)
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.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:317)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:298)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

Try using a DB connection provider, like c3p0,
Add to pom.xml
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.2.1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>4.3.6.Final</version>
</dependency>
And add these line into hibernate.cfg.xml
<property name= "hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.acquire_increment">5</property>
<property name="hibernate.c3p0.idle_test_period">1800</property>
<property name="hibernate.c3p0.max_size">600</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.timeout">1800</property>

spring JPA with c3p0 is having connection timeout on first request

We are trying to implement connection pooling using c3p0. The issue is when there are no transactions on our server for long time, the very first next transaction have connection timeout issue.
Exception stacktrace:
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.Pers
istenceException: org.hibernate.TransactionException: JDBC begin transaction failed:
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transacti
on; nested exception is javax.persistence.PersistenceException: org.hibernate.TransactionException: JDBC begin t
ransaction failed:
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPla
tformTransactionManager.java:373)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(Tra
nsactionAspectSupport.java:427)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(Transact
ionAspectSupport.java:276)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java
:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy559.getMerchantById(Unknown Source)
at com.ag.controller.MerchantController.getMerchantById(MerchantController.java:1111)
at com.ag.controller.MerchantController.checkoutMerchant(MerchantController.java:226)
at sun.reflect.GeneratedMethodAccessor1766.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:22
1)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod
.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(S
ervletInvocableHandlerMethod.java:111)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMetho
d(RequestMappingHandlerAdapter.java:806)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(Req
uestMappingHandlerAdapter.java:729)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodA
dapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:
85)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at com.ag.configuration.XSSFilter.doFilter(XSSFilter.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.PersistenceException: org.hibernate.TransactionException: JDBC begin transaction fa
iled:
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.j
ava:1771)
at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:64)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:166)
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)
... 53 more
Caused by: org.hibernate.TransactionException: JDBC begin transaction failed:
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:76)
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162)
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435)
at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:61)
... 55 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from t
he server was 54,078,423 milliseconds ago. The last packet sent successfully to the server was 54,078,423 milli
seconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring a
nd/or testing connection validity before use in your application, increasing the server configured values for cl
ient timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:400)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1038)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3621)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2429)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2541)
at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4882)
at com.mchange.v2.c3p0.impl.NewProxyConnection.setAutoCommit(NewProxyConnection.java:912)
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:72)
... 58 more
Caused by: java.net.SocketException: Connection timed out
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3603)
... 64 more
DataSource Configuration:
#Primary
#Bean
public DataSource agDataSource() {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
try {
dataSource.setDriverClass(Preconditions.checkNotNull(environment.getRequiredProperty("hibernate.connection.driver_class")));
} catch (IllegalStateException | PropertyVetoException e) {
e.printStackTrace();
}
dataSource.setJdbcUrl(Preconditions.checkNotNull(environment.getRequiredProperty("hibernate.connection.url")));
dataSource.setUser(Preconditions.checkNotNull(environment.getRequiredProperty("hibernate.connection.username")));
dataSource.setPassword(Preconditions.checkNotNull("hibernate.connection.password"));
}
#Primary
#Bean(name="agEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean agEntityManagerFactory() throws ClassNotFoundException {
final LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(agDataSource());
entityManagerFactoryBean.setPackagesToScan(new String[] { "com.ag.entities" });
entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistenceProvider.class);
final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setShowSql(true);
entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
//entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter);
entityManagerFactoryBean.setJpaProperties(hibernateProperties());
entityManagerFactoryBean.afterPropertiesSet();
entityManagerFactoryBean.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());
return entityManagerFactoryBean;
}
#Primary
#Bean(name = "agTransactionManager")
public PlatformTransactionManager agTransactionManager() {
final JpaTransactionManager transactionManager = new JpaTransactionManager();
try {
transactionManager.setEntityManagerFactory(agEntityManagerFactory().getObject());
transactionManager.setDataSource(agDataSource());
transactionManager.setJpaDialect(new HibernateJpaDialect());
//transactionManager.setNestedTransactionAllowed(true);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return transactionManager;
}

I am able to solve the issue by setting the connection pooling properties on datasource object itself. I think the hibernate properties are not able to reflect the pooling setting. I am able to replicate the issue on dev environment by setting wait_timeout=60, interactive_timeout=60 ( i.e. 1 min) in my.ini file of mysql. Then After server started I tried first transaction, waited for 1 min, then tried the txn which failed. Then I enabled the query log(by setting two more properties in my.ini:
general_log = 1
general_log_file = "C:/xampp/mysql/data/mysql.log"
I enabled above settings to check whether my select 1 validation query is getting executed or not.I tried the pooling setting on datasource object itself it starts working. The query log was also showing the selec 1 execution every hibernate.c3p0.idle_test_period seconds.
#Primary
#Bean
public DataSource agDataSource() {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
try {
dataSource.setDriverClass(environment.getRequiredProperty("hibernate.connection.driver_class"));
} catch (IllegalStateException | PropertyVetoException e) {
e.printStackTrace();
}
dataSource.setJdbcUrl(environment.getRequiredProperty("hibernate.connection.url"));
dataSource.setUser(environment.getRequiredProperty("hibernate.connection.username"));
dataSource.setPassword(environment.getRequiredProperty("hibernate.connection.password"));
dataSource.setMaxPoolSize(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.max_size")));
dataSource.setMinPoolSize(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.min_size")));
dataSource.setMaxIdleTime(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.timeout")));
dataSource.setMaxStatements(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.max_statements")));
dataSource.setIdleConnectionTestPeriod(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.idle_test_period")));
dataSource.setAcquireIncrement(Integer.parseInt(environment.getRequiredProperty("hibernate.c3p0.acquire_increment")));
dataSource.setPreferredTestQuery(environment.getRequiredProperty("hibernate.c3p0.preferredTestQuery"));
dataSource.setTestConnectionOnCheckin(true);
dataSource.setTestConnectionOnCheckout(true);
return dataSource;
}
now it works fine. happy. I posted the answer and the steps i did to validate my setting so that it may help somebody else.

Java Hibernate cannot connect to MySQL Database

I'm trying to build a project with Hibernate 5.
When I'm testing the connection it just fails... can someone help me?
hibernate.cfg.xml:
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://IP_ADDRESS</property>
<property name="hibernate.connection.username">USER</property>
<property name="hibernate.connection.password">PASSWORD</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.connection.pool_size">30</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<mapping class="classPath"></mapping>
</session-factory>
getSessionFactory Method:
public static SessionFactory getSessionFactory() throws DataException {
if (sessionFactory == null) {
synchronized (SessionFactory.class) {
if (sessionFactory == null) {
try {
Configuration cConfig = new Configuration();
if (hibernateConfig == null)
cConfig.configure();
else
cConfig.configure(hibernateConfig);
sessionFactory = cConfig.buildSessionFactory();
} catch (Throwable ex) {
ex.printStackTrace();
throw new DataException(
DataException.GENERAL_ERROR_CODE,
"Failed to create sessionFactory object", ex);
}
} else {
return sessionFactory;
}
}
}
return sessionFactory;
}
The error is:
org.hibernate.tool.schema.spi.SchemaManagementException: Unable to open JDBC connection for schema management target
at org.hibernate.tool.schema.internal.TargetDatabaseImpl.prepare(TargetDatabaseImpl.java:42)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:57)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:129)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:97)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:481)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at com.rif.datamodel.AbstractDaoV2.getSessionFactory(AbstractDaoV2.java:37)
at com.rif.datamodel.AbstractDaoV2.hasSession(AbstractDaoV2.java:59)
at com.rif.datamodel.AbstractDaoV2.executeQuery(AbstractDaoV2.java:419)
at com.rif.hit.core.domain.property.test.Property_Crud.test(Property_Crud.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:689)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
at org.hibernate.c3p0.internal.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:73)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180)
at org.hibernate.tool.schema.internal.TargetDatabaseImpl.prepare(TargetDatabaseImpl.java:38)
... 34 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
... 38 more
Why is my connection failing and how do I fix it?

I was gonna put a comment but couldn't because of the rep points. Sorry for the inconvenience
This error might occur because of this line.
<property name="hibernate.connection.url">jdbc:mysql://IP_ADDRESS</property>
Did you put schema name after IP_ADDRESS? Something like this;
jdbc:mysql://localhost:3306/myDb

public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory(){
try {
// Create the SessionFactory from standard (hibernate.cfg.xml)
// config file.
//Annotation
Configuration cfg = new Configuration();
SessionFactory sf = (SessionFactory) cfg.configure().buildSessionFactory();
return sf;
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
}

java.lang.ClassNotFoundException: org.hibernate.HibernateException for hibernate 4

I'm trying to set up a web application with tomcat 7.0, java6 and hibernate 4.
Basically, you can say I have the same problem as in this thread: java.lang.ClassNotFoundException: org.hibernate.HibernateException , but I'm not able to solve it. I have checked build path, and everything else I've been able to think of.
So, when trying to have the servlet use the hibernate objects, I get this error:
HTTP Status 500 - Error instantiating servlet class controller.ControlServlet
Stack trace:
java.lang.ClassNotFoundException: org.hibernate.HibernateException
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
controller.SearchCommand.<init>(SearchCommand.java:25)
controller.ControlServlet.<init>(ControlServlet.java:31)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
java.lang.Class.newInstance0(Unknown Source)
java.lang.Class.newInstance(Unknown Source)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)
SearchCommand:
public class SearchCommand implements Command{
private BookingDAO dao;
public SearchCommand(){
this.dao = new BookingDAO(); // line 25
}
ControlServlet:
public ControlServlet() {
super();
commands.put("search", new SearchCommand());
}
BookingDAO:
public class BookingDAO {
private SessionFactory factory;
public BookingDAO(){
try {
factory = new Configuration().configure().buildSessionFactory();
} catch (Throwable ex) {
System.err.println("Failed to create sessionFactory object." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public void getHotel(Booking booking, int hotelId){
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Hotel hotel = (Hotel) session.get(Hotel.class, hotelId);
booking.setHotel(hotel);
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
Classpath:
http://i.stack.imgur.com/e1S2a.jpg
Can anyone help me?