DriverManagerConnectionPoolConnection not closed

Question

I am using the Oc4J connection pooling mechanism(data-source.xml) . I do a connection.close() everytime I am done with the Connection . But still I keep getting this "DriverManagerConnectionPoolConnection not closed, check your code!" all the time
Any clues whats going wrong

Answer 1

I already do that. But it does not help.
The problem probably comes from the fact that I use BLOBSo save some binary data :
[simplified version of my code:]
//Allocate a LOB using a stored proc (my prefered method, BLOB.createTemporary(...) throws a NullPointerException if used on a Pooled Connection)
OracleCallableStatement cs = (OracleCallableStatement)connection.prepareCall(
"{Call dbms_lob.createTemporary(?,false)}");
cs.registerOutParameter(1, Types.BLOB);
cs.executeUpdate();
BLOB myBlob = cs.getBLOB(1);
cs.close();
// fill the BLOB with some binary data
OutputStream outputStream = myBlob.getBinaryOutputStream();
outputStream.write(byteArray);
outputStream.flush();
outputStream.close();
// use it in an insert
preStatement = (OraclePreparedStatement)connection.prepareStatement(
INSERT_SQL);
preStatement.setBLOB(1, myBlob);
// execute the insert
preStatement.executeUpdate();
preStatement.close();
// free the BLOB
OracleCallableStatement cs2 = (OracleCallableStatement)connection.prepareCall(
"{Call dbms_lob.freetemporary(?)}");
cs2.setBLOB(1, myBlob);
cs2.executeUpdate();
cs2.close();
/// all this being enclosed try/finally very similar to the one in your sample
/// Also note that no Exception/Error are thrown (they are all caught and logged)
If the problem comes from the way Oracle Pooled connections manage BLOBs it there any other way I could use to save some binary data ?
Thanks for any answer,
Benoit