Exception: com.sun.gjc.spi.jdbc40.DataSource40 cannot be cast to oracle.jdb

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From: <glassfish_at_javadesktop.org>
Date: Mon, 16 Mar 2009 07:44:09 PDT

hi,
i'm using the next code to access an Oracle Database from glassfish:
javax.naming.InitialContext ic = new javax.naming.InitialContext();
oracle.jdbc.pool.OracleConnectionPoolDataSource ds = (oracle.jdbc.pool.OracleConnectionPoolDataSource)ic.lookup(jdbc/pool");

and i obtain the next error Exception: java.lang.ClassCastException: com.sun.gjc.spi.jdbc40.DataSource40 cannot be cast to oracle.jdbc.pool.OracleConnectionPoolDataSource

Anybody knows how can i configure glassfish connection resource or web server, to obtain a pooled connection?.

the users of aplication are the same of database. whit these can i made a pool for different users?

Thanks.
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