com.zaxxer.hikari.pool.HikariPool$PoolInitializationException：池初始化期间出现异常：springHikariCP - 连接不可用答案

【问题标题】：com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Exception during pool initialization: springHikariCP - Connection is not availablecom.zaxxer.hikari.pool.HikariPool$PoolInitializationException：池初始化期间出现异常：springHikariCP - 连接不可用
【发布时间】：2018-09-21 07:50:12
【问题描述】：

你能帮忙吗：

我启动了我的应用程序，但它在几秒钟后关闭，出现以下错误：

2018-09-21 17:34:59,500  INFO | main | com.zaxxer.hikari.HikariDataSource                        93 | springHikariCP - is starting. | 
        2018-09-21 17:35:29,535  INFO | main | com.zaxxer.hikari.pool.HikariPool                        213 | springHikariCP - is closing down. | 
        2018-09-21 17:35:29,855  WARN | main | o.s.context.support.ClassPathXmlApplicationContext       551 | Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appEntityManagerFactory' defined in class path resource [META-INF/spring/app.repositories.xml]: Invocation of init method failed; nested exception is com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Exception during pool initialization: springHikariCP - Connection is not available, request timed out after 30002ms. | 
        2018-09-21 17:35:29,870 ERROR | main | com.my.jos.jmx.Driver                            72 | CRITICAL ERROR: Error encountered starting application. | 
        org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appEntityManagerFactory' defined in class path resource [META-INF/spring/app.repositories.xml]: Invocation of init method failed; nested exception is com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Exception during pool initialization: springHikariCP - Connection is not available, request timed out after 30002ms.

【问题讨论】：

标签： spring-boot hikaricp spring-framework-beans

【解决方案1】：

如果您不需要使用 HikariCP，您可以检查您的 POM，如果它已经定义，请考虑将其删除。

您还可以确保使用以下依赖项：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

假设您使用的是xml配置，您可以确保正确设置数据源：

How to Define a MySql datasource bean via XML in Spring

【讨论】：