Spring 启动 - 重新启动后重新连接到数据库

Question

我有一个 Spring 批处理应用程序，每 10 分钟运行一次。它从 REST API 获取一些数据，然后将这些数据保存在数据库中。

那么，我现在的问题在哪里？

有时数据库 (Oracle) 可能会重启或脱机（不知道，真的）。但是应用程序似乎没有重新连接到数据库。它只是停留在空闲模式。

Spring 开机：2.1.2.RELEASE

application.yml 看起来像这样：

app:
  database:
    jdbc-url: jdbc:oracle:thin:@<host>:<port>:<db>
    username: <username>
    password: <password>
    driver-class-name: oracle.jdbc.OracleDriver
    options:
      show-sql: true
      ddl-auto: none
      dialect: org.hibernate.dialect.Oracle12cDialect

然后，我这样配置数据源：

    public DataSource dataSource() {
        HikariConfig configuration = new HikariConfig();

        configuration.setJdbcUrl(properties.getJdbcUrl());
        configuration.setUsername(properties.getUsername());
        configuration.setPassword(properties.getPassword());
        configuration.setDriverClassName(properties.getDriverClassName());
        configuration.setLeakDetectionThreshold(60 * 1000);

        return new HikariDataSource(configuration);
    }

    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        em.setDataSource(dataSource);

        em.setPackagesToScan("xxx.xxx.xx");
        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        em.setJpaVendorAdapter(vendorAdapter);

        Properties additionalProperties = properties();
        em.setJpaProperties(additionalProperties);

        return em;
    }

    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        return new JpaTransactionManager(emf);
    }

    private Properties properties() {
        Properties additionalProperties = new Properties();
        additionalProperties.setProperty("hibernate.hbm2ddl.auto", properties.getOptions().getDdlAuto());
        additionalProperties.setProperty("hibernate.dialect", properties.getOptions().getDialect());
        additionalProperties.setProperty("hibernate.show_sql", properties.getOptions().getShowSql());
        return additionalProperties;
    }

老实说，我不太确定这里的配置是否有问题。

谢谢！

Answer 1

您应该配置 maxLifetime by setMaxLifetime 30 分钟

 configuration.setMaxLifetime(108000);

property controls the maximum lifetime of a connection in the pool. When a connection reaches this timeout, even if recently used, it will be retired from the pool. An in-use connection will never be retired, only when it is idle will it be removed.

We strongly recommend setting this value, and it should be at least 30 seconds less than any database or infrastructure imposed connection time limit.

by default Oracle does not enforce a max lifetime for connections

Spring 启动 - 重新启动后重新连接到数据库

Spring Boot - Reconnect to a database after its restart

oracle

hibernate

spring-batch

spring-boot

hikaricp