getAllDependentTables ORA-01000: maximum open cursors exceed

when try receive list of tables:
String[] depTableNames =TablesDependencyHelper.getAllDependentTables( dbUnitconnection, "TABLENAME" );

Exception appear:
java.sql.SQLException: ORA-01000: maximum open cursors exceeded

Parameter 'open_cursors' at server contains value=300.

If in AbstractMetaDataBasedSearchCallback.getNodes(int type, Object node, Connection conn,
String schema, DatabaseMetaData metaData, SortedSet edges)

insert rs closing (rs.close();), all work fine.