c3po 链接问题，原因就是没有把数据库权限赋给当前用户
在执行的时候报如下错误信息：

WARN - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1eeb95
e -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending task
s!
WARN - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1eeb95
e -- APPARENT DEADLOCK!!! Complete Status:
Managed Threads: 3
Active Threads: 3
Active Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@d43997
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@110f85
0 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11e8d5
c (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
Pending Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@d2ad3c

Pool thread stack traces:
Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5
,main]


解决方法：赋给当前用户 的 账号，要弄管理本数据库，就是可以对该数据库进行管理的权限