Foi resolvido da seguinte maneira.
Era um problema do Oracle XE, o SC deve fazer várias requisições
Oracle XE Tuning
por Mark Allen - Última modificação 16/02/2008 19:50 Oracle XE is an excellent starter database, but under normal loads the out of the box parameters need to be increased.
Database Sessions
Increase the number of sessions that the database can handle at one time. This will allow for more users to access the database.
sqlplus /nologSQL> show parameters sessionsSQL> alter system set sessions=250 scope=spfile;
restart the database.
Database Processes
Increase the number of database processes that can be running at one time. This will allow for more users to connect to the database.
sqlplus /nologSQL> show parameters processesSQL> alter system set processes=200 scope=spfile;restart the database.