因为原先使用的c3p0链接池，时常出现：APPARENTDEADLOCK!!!Creatingemergencythreadsforunassignedpendingtasks，以及出现线程死锁的情况导致服务器经常需要重启，很是头疼。所以考虑使用Druid链接池来代替原先的c3p0.AlibabaDruid中文文档(https:/

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首先你要切换root：sudoi后续换行输入你的密码1、yum包更新到最新yumupdate!在这里插入图片描述(https://oscimg.oschina.net/oscnet/up6283fd79c482192f4bc065c6461aea56.png)2、安装需要的