Hi guys.
I ran into an extrodinary error, "Protocol Violation" in JDBC.
This error occurred in rs.next() method (ResultSet rs) for a specific record of result set.
Why this happen? any ideas?

java.sql.SQLException: Protocol violation
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:383)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java, Compiled Code)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java, Compiled Code)
at oracle.jdbc.ttc7.TTC7Protocol.fetch(TTC7Protocol.java, Compiled Code)

at oracle.jdbc.driver.OracleResultSet.next(OracleResultSet.java, Compiled Code)
at UserList.getUsers(UserList.java, Compiled Code)
at UserList.run2(UserList.java:100)
at UserList.main(UserList.java:28)