这个一般会出现在连接池中，导致连接池数量不够然后连接失败，所以要kill

我们kill的都是sleep的，就是没有释放但是不用的链接

前言

sql中的show full processlist是查看线程，实际就是查这个表

select * from information_schema.processlist where COMMAND = 'Sleep' and Time>30

然后在配上kill id，就能释放，为了以后方便寻找，我把他写成了接口，我通过shell脚本的curl 调用这个接口，就能实现轮询释放。

代码实现

controller层代码

 @GetMapping("kill")public RsJsonBean killProcess(@Param("key") String key) {SqlSession mybaiteSession = null;try {if (key.equals("#sdfada!")) {//密钥，当这个成立时，则会释放所有线程，腾出空间mybaiteSession =DBCPUtil.getMybaiteSession();infoMapper = mybaiteSession.getMapper(InfoMapper.class);List<HashMap> hashMaps = infoMapper.selectProcess();for (int i = 0; i < hashMaps.size(); i++) {HashMap hashMap = hashMaps.get(i);int id =Integer.parseInt(hashMap.get("ID").toString());infoMapper.killProcess(id);}mybaiteSession.commit();return new RsJsonBean(1, "成功释放");}//密钥不匹配return new RsJsonBean(0, "释放失败:" + "密钥不匹配");} catch (Exception e) {return new RsJsonBean(0, "释放失败:" + e.getMessage());} finally {if (mybaiteSession != null) {mybaiteSession.close();}}}

mybaites代码,sql

//查询所有符合条件的线程
List<HashMap> selectProcess();
//释放某个线程
int killProcess(@Param("id") int id);

<select id="selectProcess" resultType="java.util.HashMap">select * from information_schema.processlist where COMMAND = 'Sleep' and Time>15
</select><delete id="killProcess">kill #{id}
</delete>

shell脚本

通过curl方式的特殊字符不能用。

curl -XGET http://127.0.0.1:8087/info/kill?"key=23aoTest"

-XGET代表get请求,crul中参数拿""标起来

#!/bin/bash
while true
do
echo "开始，请等待5秒"sleep 5secho `curl -XGET http://127.0.0.1:8087/info/kill?"key=23aoTest"`echo `date`echo "-----"
done