我在Java中的新手请帮助我理解如何正确。我的英语基础水平......
我使用OpenShift之前,也许2周或更久以前一切都很好,但上次我有3或〜<像这样的20个错误:
OpenShift可能有问题吗?或者我做坏事?
请向我解释为什么会这样?:
Caused by: javax.resource.spi.RetryableUnavailableException: IJ000653: The pool has been shutdown (MysqlDS,178e455)
类似:IJ000453: Unable to get managed connection datasources
<datasource jndi-name="java:jboss/datasources/ShopDS" enabled="${mysql.enabled}"
use-java-context="true" pool-name="MysqlDS" use-ccm="false">
<connection-url>jdbc:mysql://${env.OPENSHIFT_MYSQL_DB_HOST}:${env.OPENSHIFT_MYSQL_DB_PORT}/${env.OPENSHIFT_APP_NAME}
</connection-url>
<driver>mysql</driver>
<connection-property name="autoReconnect">true</connection-property>
<connection-property name="useUnicode">true</connection-property>
<connection-property name="autoCommit">false</connection-property>
<connection-property name="characterEncoding">UTF-8</connection-property>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>10</min-pool-size>
<max-pool-size>300</max-pool-size>
<flush-strategy>IdleConnections</flush-strategy>
<prefill>true</prefill>
</pool>
<security>
<user-name>${env.OPENSHIFT_MYSQL_DB_USERNAME}</user-name>
<password>${env.OPENSHIFT_MYSQL_DB_PASSWORD}</password>
</security>
<validation>
<valid-connection-checker
class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker" />
<check-valid-connection-sql>SELECT 1</check-valid-connection-sql>
<validate-on-match>true</validate-on-match>
<background-validation>true</background-validation>
<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter" />
</validation>
<timeout>
<idle-timeout-minutes>60000</idle-timeout-minutes>
</timeout>
</datasource>
的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>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect
</property>
<property name="hibernate.connection.datasource">java:jboss/datasources/ShopDS</property>
<property name="hibernate.connection.autoReconnect">true</property>
<property name="hibernate.connection.is-connection-validation-required">true</property>
<property name="hibernate.connection.autocommit">false</property>
<property name="hibernate.connection.release_mode">after_statement</property>
<property name="hibernate.connection.useUnicode">true</property>
<property name="hibernate.connection.characterEncoding">utf8</property>
<property name="hibernate.connection.charSet">UTF-8</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.use_sql_comments">false</property>
<property name="hibernate.format_sql">false</property>
<property name="hibernate.current_session_context_class">jta</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
<property name="hibernate.transaction.jta.platform">org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform</property>
<property name="hibernate.transaction.auto_close_session">true</property>
<property name="hibernate.archive.autodetection">class, hbm</property>
<property name="hibernate.generate_statistics">true</property>
<property name="hibernate.cache.use_query_cache">false</property>
<property name="hibernate.cache.use_second_level_cache">false</property>
<property name="hibernate.cache.use_minimal_puts">true</property>
<property name="hibernate.cache.use_structured_entries">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="hibernate.connection.pool_size">20</property>
<property name="hibernate.default_batch_fetch_size">20</property>
<property name="hibernate.max_fetch_depth">6</property>
<mapping class="small.business.dao.entity.Settings" />
</session-factory>
</hibernate-configuration>
弹簧JPA-config.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<jee:jndi-lookup jndi-name="java:/db_EntityManagerFactory" id="entityManagerFactory"
expected-type="javax.persistence.EntityManagerFactory" cache="true" />
<bean id="entityManager" class="org.springframework.orm.jpa.support.SharedEntityManagerBean">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<!-- Process the PersistenceUnit and PersistenceContext annotations -->
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="configLocation" value="classpath:hibernate.cfg.xml" />
</bean>
<!-- <bean class="org.springframework.orm.hibernate4.support.OpenSessionInViewInterceptor"> -->
<!-- <property name="sessionFactory" ref="sessionFactory" /> -->
<!-- </bean> -->
<bean class="org.springframework.orm.hibernate4.HibernateExceptionTranslator" />
<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="transactionManagerName" value="java:/TransactionManager" />
<property name="userTransactionName" value="java:jboss/UserTransaction" />
<property name="transactionSynchronizationRegistryName" value="java:jboss/TransactionSynchronizationRegistry" />
</bean>
</beans>
使用@Transactional anotation调用GenericDAO方法
package small.business.dao;
import java.lang.reflect.ParameterizedType;
import javax.persistence.EntityManager;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.exception.GenericJDBCException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import small.business.domainmodel.interfaces.IElement;
/**
*
* @author 452
*/
public abstract class GenericDAO<E extends IElement<?>> {
private static final Logger log = LoggerFactory.getLogger(GenericDAO.class);
protected Class<E> entityClass;
@Autowired
protected EntityManager entityManager;
@Autowired
protected SessionFactory sessionFactory;
@SuppressWarnings("unchecked")
public GenericDAO() {
entityClass = (Class<E>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
}
@SuppressWarnings("unchecked")
public E getCurrentElement(Long currentElement) {
E element = null;
try {
//element = entityManager.find(entityClass, currentElement);
Session session = sessionFactory.getCurrentSession();
//element = (E) session.load(entityClass, currentElement);
element = (E) session.get(entityClass, currentElement);
} catch (Exception e) {
log.error(e.getMessage(), e);
} finally {
}
return element;
}
public E saveOrUpdate(E currentElement) throws Exception {
E result;
try {
result = entityManager.merge(currentElement);
} catch (GenericJDBCException e) {
try {
result = entityManager.merge(currentElement);
} catch (GenericJDBCException ex) {
throw new Exception("saveOrUpdate: ", ex);
}
}
return result;
}
public void remove(E currentElement) throws Exception {
E element = entityManager.find(entityClass, currentElement.getId());
entityManager.remove(element);
}
}
堆栈跟踪:
at java.lang.Thread.run(Thread.java:722)
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/ShopDS
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:137)
at org.hibernate.service.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:141)
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:276)
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:297)
... 161 more
Caused by: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/ShopDS
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:390)
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:129)
... 164 more
Caused by: javax.resource.spi.RetryableUnavailableException: IJ000653: The pool has been shutdown (MysqlDS,178e455)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:264)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getTransactionNewConnection(AbstractPool.java:495)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:374)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:329)
JBoss AS 7.1.1,MySql 5,Hibernate 4,Spring 3.2.2
答案 0 :(得分:0)
还尝试ssh到您的应用程序(rhc ssh {appName}),看看您是否可以通过在控制台上运行“mysql”来连接到数据库。如有必要,请尝试使用“rhc cartridge restart mysql-5.1 {appName}”重新启动mysql盒式磁带。关于检查你的mysql日志错误的+1:
https://openshift.redhat.com/community/faq/how-to-troubleshoot-application-issues-using-logs