connectionmysqljavadbcpexception
使用的dbcp连接池和mysql数据库，偶尔会出现这种异常，不知是什么导致的，并且在出现这个异常的地方进行对exception的catch，但是奇怪的时捕获不了这种异常，异常一直被传回虚拟机然后打印，请哪位大侠指导一下，具体的异常如下
警告: connection has been abandoned pooledconnection[com.mysql.jdbc.connection@5
17667bd]:java.lang.exception
at org.apache.tomcat.jdbc.pool.connectionpool.getthreaddump(connectionpo
ol.java:1062)
at org.apache.tomcat.jdbc.pool.connectionpool.createconnection(connectio
npool.java:704)
at org.apache.tomcat.jdbc.pool.connectionpool.borrowconnection(connectio
npool.java:631)
at org.apache.tomcat.jdbc.pool.connectionpool.init(connectionpool.java:4
85)
at org.apache.tomcat.jdbc.pool.connectionpool.(connectionpool.java
:143)
at org.apache.tomcat.jdbc.pool.datasourceproxy.pcreatepool(datasourcepro
xy.java:116)
at org.apache.tomcat.jdbc.pool.datasourceproxy.createpool(datasourceprox
y.java:103)
at org.apache.tomcat.jdbc.pool.datasourceproxy.getconnection(datasourcep
roxy.java:127)
at analyseutil.dbmanager.c3p0connectionpool.getconnection(c3p0connection
pool.java:38)
at analyseutil.dbmanager.dbmanager.findcompanybyname(dbmanager.java:41)
at datastore.insertorupdate.handlenextdata(insertorupdate.java:108)
at datastore.insertorupdate$1.run(insertorupdate.java:48)
at java.lang.thread.run(thread.java:662)