Strange problem: JDBC: Oracle Connection: Cursor hangs in ResultSet

Question

Hi,
My program connects to an oracle db and queries all records (480'000) from a table with 4 columns (of which one, Z00_DATA, is of type LONG (and on average is about 1000 chars long)).
From my Windows machine, the program runs fine.
From a linux box the same program doesn't: it executes the statement, but when I skim through the returned resultset (even if I only count the number of records in it, it gets stuck on record 80. No exception thrown (I'm catching a general Exception object), it just hangs.
[[ while (rs.next) { counter++; System.out.println(counter);} ]]
When I change my query slightly and select only 3 columns (all except the LONG one), it runs fine again.
This seems very odd to me since I'm not even reading the data inside the resultSet. (I will later, I'm just debugging now).
Here's the code, if anyone can, please help.
Charlie
code:
public void getNoticesData(String tableName, String[][] cols){   
try {           
     // statements
     Statement stmt = alephConn.createStatement();
     String selectSQL = "select Z00_DOC_NUMBER, Z00_NO_LINES, Z00_DATA_LEN, Z00_DATA from lux01.z00";
     // get data from DB
     stmt.execute(selectSQL);
     ResultSet rs = stmt.getResultSet();
     p("SELECT SQL EXECUTED: " + selectSQL);
     int resultsCounter=0;
     // for all results
     while (rs.next()) {       
          resultsCounter++;
          p(resultsCounter + ", ");
     } // cursor
     // Close resources
     stmt.close();
catch (Exception e) {     
     p("Exception thrown: " + e);
finally {     
     p("Finally clause");
}

Answer 1

Hi,
My program connects to an oracle db and queries all
records (480'000) from a table with 4 columns (of
which one, Z00_DATA, is of type LONG (and on average
is about 1000 chars long)).
And what is the maximum?
And with the query order what is the size of the long field for the 80th row.
From my Windows machine, the program runs fine.
From a linux box the same program doesn't: it
executes the statement, but when I skim through the
returned resultset (even if I only count the number
of records in it, it gets stuck on record 80. No
exception thrown (I'm catching a general Exception
object), it just hangs.Orcacle drivers for some reason have a tendency to have odd problems.
What are the field types?
Do you have the long field at the end of the field list?
Try it with no data in the long field. And then increase it up to the maximum in the database.