How can I get warning from impala from JDBC?

[#1]

Hello, everyone!

I have encountered an issue with obtaining warning from query from my app.

Let's say I have a table in impala with DDL like this:

CREATE TABLE db1.t1 (
    id int, 
    name string
) 
ROW FORMAT DELIMITED FIELDS TERMINATED BY "," 
STORED AS TEXTFILE 
LOCATION '/db1/t1';

Than I put CSV file below in table directory:

1,sdf
dasd,2

After  I  do "INVALIDATE METADATA" and "SELECT * FROM db1.t1", I got several warnings:

WARNINGS: Error converting column: 0 to INT
Error parsing row: file: hdfs://hdpmigr.gaz.ru:8020/db1/t1/t1.csv, before offset: 21

I want to get these warnings from my app using JDBC driver. 
Here is a simple class, where I want to print warnings above:

import java.sql.*;
public class Tst {
    public static void main(String[] args) {
        try(Connection conn = DriverManager.getConnection("jdbc:impala://127.0.0.1:21050");
        Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("select * from db1.t1")) {
            System.out.println(conn.getWarnings());
            System.out.println(stmt.getWarnings());
            System.out.println(rs.getWarnings());
            while(rs.next())
                System.out.println(rs.getInt("id"));
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}

All three getWarnings print "null". The question is can I somehow get warnings which I receive from impala-shell? 

[#2]

I think you want to put the result set getWarnings() inside the while loop.

while(rs.next()){
     System.out.println(rs.getInt("id"));
     if (rs.getWarnings() != null ) {
          System.out.println(rs.getWarnings());
          System.out.println(rs.clearWarnings());
     }
}

According to the JDBC ResultSet docs,   ResultSet warnings are set for each row when you call a method on the ResultSet which you haven't done yet in your current code.    Also, warnings on multiple rows are appended which is why I added the clearWarning().

[#3]

Yeah, that was my bad. However, this didn't help. 
I want to get warnings that I get from impala-shell when warning like below happens. Or at least something that can indicate these warnings to process it properly. 

WARNINGS: Error converting column: 0 to DECIMAL(38,15)

Error parsing row: file: hdfs://hdpmigr.gaz.ru:8020/db1/t1/t1.csv, before offset: 52

Method getWarnings() doesn't help, probably there is another method to get it