CloudFoundry连接Mysql数据库出现的问题

我在jsp页面中插入以下语句，为什么会出错呢？
错误如下：
javax.servlet.ServletException: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

<%
String str = "";
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:10100/dabc98d7befac43df8d0bc7d69577718e" +
  "?useUnicode=true&characterEncoding=gb2312&autoReconnect=true&failOverReadOnly=false";
Connection con= DriverManager.getConnection(url,"u7T3cy8R52Xun","pWJpeuwrSiChH");
Statement smt=con.createStatement();
String sql = "select * from admins";
ResultSet rs = smt.executeQuery(sql);
while(rs.next())
{
 str = rs.getString(1);

out.print(str);
}
%>

但是在java文件中直接执行下列语句没问题啊.

String str = "";
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:10100/dabc98d7befac43df8d0bc7d69577718e" +
  "?useUnicode=true&characterEncoding=gb2312&autoReconnect=true&failOverReadOnly=false";
Connection con= DriverManager.getConnection(url,"u7T3cy8R52Xun","pWJpeuwrSiChH");
Statement smt=con.createStatement();
String sql = "select * from admins";
ResultSet rs = smt.executeQuery(sql);
while(rs.next())
{
 str = rs.getString(1);
System.out,print(str);
}

这是为什么呢？是CloudFoundry的问题，还是我这边的问题啊？求高手赐教，感激不尽。