cause: org.springframework.jdbc.cannotgetjdbcconnectionexception: failed to obtain jdbc connection; nested exception is com.alibaba.druid.pool.getconnectiontimeoutexception: wait millis 6045, active 25, maxactive 700, creating 1, createelapsemillis 29 中文回答
该异常信息表示在Spring框架中，由于无法获取JDBC连接而引发了org.springframework.jdbc.CannotGetJdbcConnectionException异常。具体原因在于使用的数据库连接池是阿里巴巴的Druid，从异常详细信息可以看出以下几个关键点： 1. `wait millis 6045`：表示线程等待获取连接的时间已经达到了6045毫秒。 2. `active 25`：当前活动（正在使用）的数据库连接数量为25个。 3. `maxactive 700`：Druid数据源配置的最大活跃连接数为700个。 4. `creating 1`：目前有1个连接正在创建中。 5. `createelapsemillis 29`：创建这个连接已经耗时29毫秒。 综合上述信息，问题的原因可能是在高并发场景下，所有可用的数据库连接已被占用，并且新的连接创建速度无法满足请求需求，导致在指定等待时间内（这里是6045毫秒）仍无法获取到数据库连接，从而抛出了此异常。 解决方案可以考虑优化数据库连接池配置，如适当增大最大连接数、调整超时时间，或者检查是否有数据库连接未被正确释放的情况，同时也可以从应用程序层面优化SQL执行效率和并发策略，减少不必要的数据库连接使用。 [2024-03-06 11:26:54 | AI写代码神器 | 279点数解答]
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