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My Java Web application, using Hibernate, published on a Glassfish server and using Mysql database published on Hostgator this causing, constantly the following error:
[2018-01-31T11:51:15.852-0200] [glassfish 4.0] [WARNING] [] [com.mchange.v2.resourcepool.BasicResourcePool] [tid: _ThreadID=264 _ThreadName=C3P0PooledConnectionPoolManager[identityToken->1hge39o9tic1bab1mwszpa|98964cd]-HelperThread-#1] [timeMillis: 1517406675852] [levelValue: 900] [[
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@9f55fed -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: java.lang.IllegalStateException: This web container has not yet been started
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:897)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:886)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:877)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:873)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:443)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)
Caused by: java.lang.IllegalStateException: This web container has not yet been started
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1652)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1611)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:191)
at com.mysql.jdbc.Util.getInstance(Util.java:408)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:918)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:897)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:886)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:807)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.GeneratedConstructorAccessor356.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
... 11 more
]]
I’ve been trying for days to find the problem, but unfortunately I can’t.
Follow below my codes:
Hibernate.cfg.xml
<!-- ****Configurações de Conexão ao Banco de Dados **** --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/meuBD?zeroDateTimeBehavior=convertToNull</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">123456</property> <!-- **** Propriedades do C3P0 - Pool de Conexão **** --> <property name="hibernate.c3p0.acquireIncrement">3</property> <property name="hibernate.c3p0.initialPoolSize">5</property> <property name="hibernate.c3p0.minPoolSize">5</property> <property name="hibernate.c3p0.maxPoolSize">50</property> <property name="hibernate.c3p0.maxIdleTime">5</property> <property name="hibernate.c3p0.acquireRetryAttempts">50</property> <property name="hibernate.c3p0.numHelperThreads">20</property> <property name="hibernate.c3p0.checkoutTimeout">0</property> <property name="hibernate.c3p0.testConnectionOnCheckin">true</property> <!-- **** SQL Dialect **** --> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <!-- **** Gerenciamento do Contexto da Sessão **** --> <property name="current_session_context_class">thread</property> <!-- **** Desabilitando Cache de segundo nível **** --> <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property> <!-- **** Mapeamento das Entidades **** -->
Hibernateutil
private static SessionFactory sessionFactory; public static SessionFactory getFactory() { if (sessionFactory == null) { sessionFactory = HibernateUtil.buildSessionFactory(); } return sessionFactory; } private static SessionFactory buildSessionFactory() { try { Configuration configuration = new Configuration().configure(); StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder(); serviceRegistryBuilder.applySettings(configuration.getProperties()); ServiceRegistry serviceRegistry = serviceRegistryBuilder.build(); SessionFactory session = configuration.buildSessionFactory(serviceRegistry); return session; } catch (HibernateException ex) { System.err.println("Criação da SessionFactory failed." + ex); throw new ExceptionInInitializerError(ex); } }
DAO class
private final Class<Entidade> classe; private Transaction transaction = null; private SessionFactory sessionFactory = null; @SuppressWarnings("unchecked") public GenericDAO() { this.classe = (Class<Entidade>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0]; sessionFactory = HibernateUtil.getFactory(); } public void salvar(Entidade entidade) { try { transaction = sessionFactory.getCurrentSession().beginTransaction(); sessionFactory.getCurrentSession().save(entidade); transaction.commit(); } catch (RuntimeException erro) { if (transaction != null) { transaction.rollback(); } throw erro; } } public void excluir(Entidade entidade) { try { transaction = sessionFactory.getCurrentSession().beginTransaction(); sessionFactory.getCurrentSession().delete(entidade); transaction.commit(); } catch (RuntimeException erro) { if (transaction != null) { transaction.rollback(); } throw erro; } } public void editar(Entidade entidade) { try { transaction = sessionFactory.getCurrentSession().beginTransaction(); sessionFactory.getCurrentSession().update(entidade); transaction.commit(); } catch (RuntimeException erro) { if (transaction != null) { transaction.rollback(); } throw erro; } } public List<Entidade> listar() { List<Entidade> resultado; try { transaction = sessionFactory.getCurrentSession().beginTransaction(); Criteria consulta = sessionFactory.getCurrentSession().createCriteria(classe); resultado = consulta.list(); transaction.commit(); } catch (RuntimeException erro) { if (transaction != null) { transaction.rollback(); } throw erro; } return resultado; } @SuppressWarnings("unchecked") public Entidade buscar(Integer id) { Entidade resultado; try { transaction = sessionFactory.getCurrentSession().beginTransaction(); Criteria consulta = sessionFactory.getCurrentSession().createCriteria(classe); consulta.add(Restrictions.idEq(id)); resultado = (Entidade) consulta.uniqueResult(); transaction.commit(); } catch (RuntimeException erro) { if (transaction != null) { transaction.rollback(); } throw erro; } return resultado; }
As I mentioned above, this is a constant problem and unfortunately I can’t figure out its causes.
In my development base, this error happens very little, but in my production base, it is recurrent.
Please, if anyone can help me.
Thank you very much
The connection was not closed because I am using the 'transaction = sessionFactory.getCurrentSession() method. beginTransaction();'. This way the connection is closed when the commit is done'.
– EduOK