Record lock issue - is it JT400 ?

[Pete Helgren <Pete@xxxxxxxxxx>]

I have a program that has pretty simple process of  establishing a JDBC 
connection, opening up a recordset with a simple select statement 
(prepared) and then closing the recordset and closing the statement like so:

         PreparedStatement ps = conn.prepareStatement(query);
         ResultSet rs = ps.executeQuery();        
         for (int i = 0; i < 2; i++) {
             if (rs.next())
                 System.out.println(rs.getString(1));           
         }        
         try {
             rs.close();
             ps.close();
             ps = null;
             rs = null;
         }
         catch (SQLException ex){
             ex.printStackTrace();
         }

All is well.  The file that was opened in the query is now unlocked.  
Things are OK.

But if I run the same query again, when I execute the try block, closing 
the recordset and statement , without closing the connection, the file I 
opened in the select statement is now locked.  Work with job locks show 
the following on the file:
\
                      Object                      Member
Object      Library     Type       Lock     Status  Locks

PGNL601     FMSMICF     *FILE-PHY  *SHRRD    HELD    YES

So I am wondering is JT400 holding a lock on the file assuming that it 
will be accessed again?  Is this a bug?  A configuration issue?

Any ideas?

Pete Helgren