| Bug #11259 | Cannot connect using connectionpooling with Tomcat 5.5.9 | ||
|---|---|---|---|
| Submitted: | 11 Jun 2005 11:19 | Modified: | 14 Jun 2005 23:32 |
| Reporter: | M Wensink | ||
| Status: | Closed | ||
| Category: | Connector/J | Severity: | S1 (Critical) |
| Version: | latest snapshot | OS: | Microsoft Windows (w2k) |
| Assigned to: | Target Version: | ||
[11 Jun 2005 11:19]
M Wensink
[13 Jun 2005 10:01]
Vasily Kishkin
Could you please provide more information about this bug ? Could you write here any test case ?
[13 Jun 2005 18:01]
M Wensink
I have made a smal website to test the bug I previously reported. You have to unpack te zip, plave the server.xml in the tomcat conf directury and the bugtest directory in the webapps directory of tomcat. The problem is with the autoReconnect feature. Disabling this in the server.xml does not give the problem anymore
[13 Jun 2005 18:42]
M Wensink
I did not manage to send the zip. I have isolated the file in the testprogram below:
import com.mysql.jdbc.jdbc2.optional.*;
import java.sql.*;
public class Test {
private static final String server = "localhost";
private static final String database = "test";
private static final String username = "root";
private static final String password = "root";
private Statement stmt;
public static void main (String [ ] args)
{
try
{ System.err.println ("Initialize datasource");
MysqlDataSource ds = new MysqlDataSource();
ds.setServerName (server);
ds.setDatabaseName (database);
ds.setUser (username);
ds.setPassword (password);
ds.setAutoReconnect (true);
System.err.println ("Setup database connection\n");
Connection conn = ds.getConnection();
test (conn);
}
catch (Exception e)
{ e.printStackTrace (System.err);
System.exit (1);
}
}
private static void test (Connection conn) throws Exception
{
Statement stmt = conn.createStatement();
try {
stmt.executeUpdate ("DROP TABLE IF EXISTS test");
stmt.executeUpdate ("CREATE TABLE test (field integer)");
stmt.executeUpdate ("INSERT INTO test (field) VALUES (0)");
PreparedStatement ps = conn.prepareStatement ("SELECT * FROM test");
ResultSet rs = ps.executeQuery();
while (rs.next())
{ Integer i = (Integer) rs.getObject ("field");
System.out.println ("field: " + i);
}
ps.close();
}
finally {
stmt.executeUpdate ("DROP TABLE IF EXISTS test");
}
}
}
[14 Jun 2005 23:32]
Mark Matthews
Fixed for 3.1.9. You should be able to test this with a nightly snapshot after 00:00 GMT Jun-15 from http://downloads.mysql.com/snapshots.php#connector-j Thanks for your bug report. btw, autoReconnect is going to get deprecated in Connector/J 3.2. You should look at something that is more robust, such as the example listed at: http://dev.mysql.com/doc/connector/j/en/cj-faq.html#id2829608 You should also configure your connection pool to not allow stale connections, and periodically test them if stale connections are an issue for your application.
