proxool的连接出的错，请大家帮忙如何解决

[beijixuem]

org.springframework.transaction.TransactionSystemException: Could not commit JDBC transaction; nested exception is java.sql.SQLException: Couldn't perform the operation commit: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see logs).
Caused by:
java.sql.SQLException: Couldn't perform the operation commit: You can't perform any operations on this connection. It has been automatically closed by Proxool for some reason (see logs).
at org.logicalcobwebs.proxool.WrappedConnection.invoke(WrappedConnection.java:207)
at org.logicalcobwebs.proxool.WrappedConnection.intercept(WrappedConnection.java:87)
at oracle.sql.BfileDBAccess$$EnhancerByProxool$$232a605e.commit(<generated>)

是时间不够，还是怎么一回事？报这样的错误？