c3p0连接oracle报错

错误信息：

WARNING: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@38882d9a -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!

四月 14, 2018 1:58:58 下午 com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector run
WARNING: com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@38882d9a -- APPARENT DEADLOCK!!! Complete Status: 
Managed Threads: 3
Active Threads: 3
Active Tasks: 
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@17dc5237 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@199a51e (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@e275564 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
Pending Tasks: 
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@38571f7e

com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@5fd4a617

错误原因：

在c3p0-config.xml配置文档中将jdbc写成大写。

xml文档大小写敏感，一定要注意，还有各种不该有的空格等！