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paip.提高稳定性---自动检测sleepmysql数据库死连接以及kill

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WBOYOriginal
2016-06-07 15:23:081373browse

//////检测本应用的泄漏数据库过滤 主要原理是: a.在调用conn时,得到conn的localport,存储为一个list b.从mysql查询本机器所有的连接 检测本机的泄漏数据库连接(大概) select * from information_schema.processlist where user=root and host like 192.168.1

//////检测本应用的泄漏数据库过滤
主要原理是:
a.在调用conn时,得到conn的localport,存储为一个list
b.从mysql查询本机器所有的连接
检测本机的泄漏数据库连接(大概)
select * from information_schema.processlist where user='root' and host like '192.168.1.1:%' and db='dbname' command='sleep' and time>60 and state='' and info is NULL

529 root atipc:8213 test Sleep 9932

c.判断localport,取得交集..就是本应用发出的conn...
d.循环调用使用kill id ,释放连接..

最难点的部分在于得到发出的连接对应的localport...
解开mysql jdbc5.1.7 驱动源码..把MysqlIO.java以及JDBC4Connection.java加入源码包..这样生成的class会先加载

修改/src/com/mysql/jdbc/MysqlIO.java,不个默认private的Socket改成public的..
/**attilax o13,change protect to public The connection to the server */
public Socket mysqlConnection = null;

修改JDBC4Connection.java, 不个默认protect的getIO()改成public的..
/**
* attilax o13
*/
public MysqlIO getIO() throws SQLException {

return super.getIO();
}

这样走ok兰..代码中调用...
JDBC4Connection conx=(JDBC4Connection) con;
MysqlIO mio=conx.getIO();
System.out.println(mio.mysqlConnection.getLocalPort());
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