JDBC连接池的问题.请问在什么情况下,找了好久,找不到原因.

org.apache.tomcat.jdbc.pool.ConnectionPoolabandon

警告:ConnectionhasbeenabandonedPooledConnection[com.mysql.jdbc.JDBC4Connection@5ebeda8]:java.lang.Exception

atorg.apache.tomcat.jdbc.pool.ConnectionPool.getThreadDump(ConnectionPool.java:1023)

atorg.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:752)

atorg.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:600)

atorg.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:179)

atorg.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:126)

atcom.smartererp.common.db.BaseDao.getConn(BaseDao.java:71)

atcom.smartererp.cos.biz.order.OrderDAO.generateMakeorderSyncInfo(OrderDAO.java:823)

atcom.smartererp.cos.biz.order.OrderManager.makeOrder(OrderManager.java:54)

atcom.smartererp.cos.ui.order.OrderFacade.makeOrder(OrderFacade.java:40)

atpc.PC001Action._btnMusterPass(PC001Action.java:78)

atpc.PC001Action.execute(PC001Action.java:25)

atcom.needtool.jdf.TemplateAction.doprocess(TemplateAction.java:64)

atcom.needtool.jdf.DispatchServlet.processRequest(DispatchServlet.java:190)

atcom.needtool.jdf.DispatchServlet.doPost(DispatchServlet.java:306)

atjavax.servlet.http.HttpServlet.service(HttpServlet.java:641)

atjavax.servlet.http.HttpServlet.service(HttpServlet.java:722)

atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

atcom.needtool.jdf.CommonFilter.doFilter(CommonFilter.java:21)

atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.jav