Session disconnects when executing procedure

Question

For some reason when I execute my procedure I get a ORA-00603: Oracle server session terminated by fatal error. When I comment out the section of code below, the procedure executes without issue. I've run an Explain Plan on this SQL, but the cost is really low. I suspect it has something to do with the table that is accessed across DB Link. Any ideas how to resolve?
DB version: Oracle 10.2.0.3.0
                select UPPER(fcc_emp.EMP_LST_NM||', '||fcc_emp.EMP_FST_NM) emp_name,
                       hr.emp_email_ad
                  INTO v_fa_name,
                       v_email_addr                    
                  from table_A slea_emp,
                       table_B fcc_emp,
                       table_C@remote_DB hr
                 WHERE slea_emp.empid = fcc_emp.emp_id
                   AND slea_emp.eligible_ind = 'Y'
                   AND fcc_emp.emp_9dig_id = hr.emp_id_cd   
                   AND slea_emp.empid = v_xml_rec.EmpID
                   AND slea_emp.slea_year = gv_slea_year;  

Answer 1

Don't look at the cost in an Explain plan. But show us the plan.
You can also try to rewrite the statement
select UPPER(fcc_emp.EMP_LST_NM||', '||fcc_emp.EMP_FST_NM) emp_name,
            (select min(hr.emp_email_ad) from table_C@remote_DB hr where fcc_emp.emp_9dig_id = hr.emp_id_cd) emp_email_ad
     INTO v_fa_name,
          v_email_addr
     from table_A slea_emp,
          table_B fcc_emp
     WHERE slea_emp.empid = fcc_emp.emp_id
     AND slea_emp.eligible_ind = 'Y'
     AND slea_emp.empid = v_xml_rec.EmpID
     AND slea_emp.slea_year = gv_slea_year;   but this would return only one email address per name. And sometimes even none.