JDBC connection suspends application

Question

Hi,
I have tried to create a database connection with JDBC, but when I run the application, it "gets stuck" when it tries to create that connection. It doesn't really suspend the thread, but the application just hangs there and shows no indication of whether the connection worked or failed.
Has anyone run across that problem before? How do I solve that?
my code:
                Statement anfrage = null;
          ResultSet rowset = null;
          try {
              DriverManager.registerDriver(new Driver());
              Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/test?" +
                                             "user=xxxx&password=xxxx");
              // send queries
              anfrage = conn.createStatement();
              rowset = anfrage.executeQuery("SELECT * FROM parseddata");
              while(rowset.next()){
                   System.out.println(rowset.getString("id") + " :works");
              rowset.close();
              anfrage.close();
          } catch (SQLException ex) {
              // handle any errors
              System.out.println("SQLException: " + ex.getMessage());
              System.out.println("SQLState: " + ex.getSQLState());
              System.out.println("VendorError: " + ex.getErrorCode());
          }the driver and the connection settings are correct (I have tried to see if the connection fails by giving invalid parameters to the connection attempt), so I'm out of ideas. It just never reaches anfrage = conn.createStatement();, but it also doesn't throw an exception (Threadstate running).
regards,
Ulrich

Answer 1

Hi b00nlander,
Here was my problem:
Using mysql-connector-java-5.1.5 and MySql Ver 11.18 Distrib 3.23.58, for redhat-linux-gnu (i386) I found that DriverManager.getConnection() would work fine when access to the mysql server was denied due to invalid username/password combination.
The problem only came when supplying correct details: the call getConnection() just hung.
I solved this problem by DOWNGRADING the version of mysql-connector to mysql-connector-java-3.1.14. I surpose one could upgrade mysql to a later release to solve this problem also.
It would seem that there is just an incompatibility between these versions of drivers and mysql?
Regards,
Ken.