idle in transaction - should I care?

Hi all.  I am new to PostgreSQL and JDBC so any help would be appreciated...

I've included some code that essentially represents a servlet that gets an
image from a PostgreSQL database.  It appears that the transaction begins,
executes, and ends correctly but then starts another query.  Where is that
last query comming from?

public void run( HttpPresentationComms comms ) throws
HttpPresentationException {
        DBConnection conn = null;

        try {
            comms.response.setContentType( "image/jpg" );
            conn = Enhydra.getDatabaseManager().allocateConnection();
            conn.setAutoCommit( false );
            ResultSet rs = conn.executeQuery(
        "SELECT IMAGE_DATA FROM IMAGE WHERE IMAGE_ID = " +
comms.request.getParameter( "id" ) );
            byte[] data = null;
            if ( rs.next() ) {
                 data = rs.getBytes( source );
            }

            conn.commit();
            conn.close();

            comms.response.getOutputStream().write( data );

        } catch ( Exception e ) {
            try {
                conn.rollback();
            } catch ( SQLException sqle ) {
                System.err.println( "ERROR rolling back" );
                sqle.printStackTrace();
            }
            e.printStackTrace();
        } finally {
            if ( conn != null ) {
                conn.release();
            }
        }
    }


Below is what I find in the PostgreSQL log.  Notice that the query executes
and commits then another query begins.  Nothing else happens after this and
the process says "idle in transaction".


2002-03-07 14:56:16 DEBUG:  query: begin
2002-03-07 14:56:16 DEBUG:  ProcessUtility: begin
2002-03-07 14:56:16 DEBUG:  query: SELECT IMAGE_DATA FROM IMAGE WHERE
IMAGE_ID = 1131
2002-03-07 14:56:16 DEBUG:  query: select proname, oid from pg_proc where
proname = 'lo_open'    or proname = 'lo_close'    or proname = 'lo_creat'
or proname = 'lo_unlink'    or proname = 'lo_lseek'    or proname = 'lo_tell'
   or proname = 'loread'    or proname = 'lowrite'
2002-03-07 14:56:16 DEBUG:  query: commit
2002-03-07 14:56:16 DEBUG:  ProcessUtility: commit
2002-03-07 14:56:16 DEBUG:  query: begin
2002-03-07 14:56:16 DEBUG:  ProcessUtility: begin

I have several questions about this:  Am I doing something wrong?  Is this
normal/expected behavior?  Will it cause problems?

--
Jeremy Ferry
jferry@iexposure.com
Internet Exposure Inc.
http://www.iexposure.com

(612) 676-1946 (ext 18)
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