Java.sql.SQLException: No operations allowed after connection closed

Question

Hi all
I was trying the jakarta DBCP pool for managing my connections to Mysql(4.0.17-standard ). I let tomcat to manage the pool by specifying datasource in server.xml and web.xml. Everything works fine if there are only a few transactions. But when the number of queries increse, I get an exception like
java.sql.SQLException: No operations allowed after connection closed.
Connection was closed explicitly by the application at the following location:
** BEGIN NESTED EXCEPTION **
java.lang.Throwable
STACKTRACE:
java.lang.Throwable
        at com.mysql.jdbc.Connection.close(Connection.java:1061)
        at org.apache.commons.dbcp.PoolableConnection.reallyClose(PoolableConnec
tion.java:124)
        at org.apache.commons.dbcp.PoolableConnectionFactory.destroyObject(Poola
bleConnectionFactory.java:196)
        at org.apache.commons.pool.impl.GenericObjectPool.returnObject(Unknown S
ource)
        at org.apache.commons.dbcp.AbandonedObjectPool.returnObject(AbandonedObj
ectPool.java:140)
        at org.apache.commons.dbcp.PoolableConnection.close(PoolableConnection.j
ava:110)
......I then tried the Connecion Pool manually with DBCP to check it is a problm with tomcat or ont. Still the exception comes after a few transactions. I re-checked the code and I am closing all connections in finally block. I searched in net for a solution, but couldnt find any. Is that a problm with mysql? has anyone experienced it? Any help will be greatly appreciated
thanks
boolee

Answer 1

Odd that Throwable is the exception logged. What does your finally block actually look like? As an experiment, what happens if you execute the following line of hypothetical code in your 'finally' block?
finally {
  System.out.println(conn.getClass().getName());
}- Saish