【解决】HikariPool-1 - Connection is not available, request timed out / Thread starvation or clock leap

问题描述：运行一个多线程程序，在一两小时不用的情况下，再执行mybatis的sql会报错。重启应用后正常，但也不是个事情。

错误日志如下：

2020-02-13 04:22:22.395 [HikariPool-1 housekeeper] WARN  com.zaxxer.hikari.pool.HikariPool -HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=30m53s308ms122µs99ns).
2020-02-13 04:25:28.566 [AsyncResolver-bootstrap-executor-0] INFO  c.n.d.shared.resolver.aws.ConfigClusterResolver -Resolving eureka endpoints via configuration
2020-02-13 04:30:28.569 [AsyncResolver-bootstrap-executor-0] INFO  c.n.d.shared.resolver.aws.ConfigClusterResolver -Resolving eureka endpoints via configuration
2020-02-13 04:30:52.716 [SchedulerFactory_Worker-4] ERROR com.task.job.HttpJob -taskExpiredDao.updateFireTime(448,df-msgcenter-core)失败,原因:nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error updating database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 925628ms.
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 925628ms.
2020-02-13 04:30:52.718 [SchedulerFactory_Worker-4] ERROR com.wanmei.df.task.job.HttpJob -

日志大概意思分析到为：

HikariPool WARN 连接泄露，然后Error连接超时，应该是使用了无效的连接没有释放或出现错误，导致客户端再次获取时候连接不可用。

检查：

1、数据库连接是否配置正确

2、数据库连接池配置问题

3、网络问题

解决：

1、我的网络没问题，那么就修改完善数据库连接池配置，添加空闲连接超时释放和最大存活时间，目的是保证连接池资源。

aximum-pool-size: 10
connection-timeout: 30000
idle-timeout: 60000
max-lifetime: 120000

单位毫秒，注意：idel+timeout的时间+1s 不能超过max-lifetime的时间，否则会置零，导致配置失效。

2、但是我配置完连接池参数还是出错，仔细查看日志，原来是配置的驱动名出错。

原来的：driver-class-name: oracle.jdbc.driver.OracleDriver

新的，正确的：driver-class-name: oracle.jdbc.OracleDriver

在1，2都修改完成后，测试观察，已经一天没有出现错误了

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【解决】HikariPool-1 - Connection is not available, request timed out / Thread starvation or clock leap

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