Question

我在5-6次请求后遇到错误。

org.springframework.dao.DataAccessResourceFailureException
Unable to acquire JDBC Connection; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection

使用下面的代码可以正常工作，除了在几次请求后耗尽连接池。

我是Spring框架的新手，并使用在线示例编写了所有这些内容。我尝试了一些变种，都失败了。任何帮助，将不胜感激。感谢。

application.yml

spring:
    datasource:
        type: com.zaxxer.hikari.HikariDataSource
        dataSourceClassName: com.mysql.jdbc.jdbc2.optional.MysqlDataSource
        jdbcUrl: jdbc:mysql://localhost:3306/db_name?autoReconnect=true&useSSL=false&useUnicode=true&characterEncoding=utf8
        catalog: db_name
        username: myusername
        password: mypassword
        testOnBorrow: true
        validationQuery: SELECT 1
        testWhileIdle: true
        timeBetweenEvictionRunsMillis: 3600000
    jpa:
        show_sql: true

hibernate:
    dialect: org.hibernate.dialect.MySQLDialect
    show_sql: false
    format_sql: true
    connection:
        provider_class: com.zaxxer.hikari.hibernate.HikariConnectionProvider
        release_mode: after_transaction
...

ApplicationConfiguration.java

@Configuration
@PropertySource("classpath:application.yml")
@EnableTransactionManagement
@EnableSwagger2
@EntityScan("com...dal.data")
public class ApplicationConfiguration extends WebMvcConfigurerAdapter {

    @Configuration
    @ConfigurationProperties(prefix="spring.datasource")
    public class JpaConfig extends HikariConfig {}

    @Autowired
    private JpaConfig jpaConfig;

    @Bean(destroyMethod = "close")
    public DataSource dataSource() {
        return new HikariDataSource(jpaConfig);
    }

    @Bean
    public SessionFactory sessionFactory() {
        LocalSessionFactoryBuilder factoryBuilder = new LocalSessionFactoryBuilder(dataSource());
        factoryBuilder.addAnnotatedClasses(
                com...dal.data.MyEntity.class, ...
        );
        return factoryBuilder.buildSessionFactory();
    }

TestDaoImpl.java

@Repository
@Scope(value = "request", proxyMode = ScopedProxyMode.TARGET_CLASS)
public class TestDaoImpl implements TestDao {

    private static final Logger logger = LoggerFactory.getLogger(TestDaoImpl.class);

    @PersistenceContext
    private EntityManager em;

    @SuppressWarnings("unchecked")
    @Override
    public List<MyEntity> getEntities() {
        return em.unwrap(Session.class)
                .createCriteria(MyEntity.class, "myEntity")
                .list();
    }

    @Override
    @Transactional
    public void saveTest(MyEntity test) throws OperationException {
        try {
            em.persist(test);
        } catch (Exception e) {
            logger.error("ERROR saving test", e);
            throw new OperationException("PS-SERVER");
        }
    }

Answer 1

本准则运作良好。

问题在于项目中的另一个@Repository类正在进行

@Inject
private SessionFactory sessionFactory;

即使代码不会在测试服务中调用，也会占用连接。我还不确定它是如何工作的，但是一旦用

替换代码

@PersistenceContext
private EntityManager em;

它有效。

Spring Hibernate连接泄漏

1 个答案: