Thanks Chris, I finally found the solutions. It was the iptables configurations. Has been needed to write a OUTPUT rule in port 3306
2010/3/8 Chris Lercher <[email protected]> > Hi Fran, > > I don't think this question is related to GWT at all. Since your code > is certainly executed on the server side, this has only to do with two > projects: MySQL, and maybe Tomcat. While it's possible that someone > here knows your answer by chance, it's so much more likely that you > get lots of good answers, if you ask the question on MySQL (or maybe > Tomcat) forums. > > Before you ask there, the first thing you should do, is to create a > new, simple test project, which doesn't use GWT or Tomcat at all, and > only uses the MySQL driver. This way, you'll see, if this has anything > to do with Tomcat (like e.g. driver conflicts...). > > HTH to find your answer > Chris > > > On Mar 8, 7:21 pm, Fran <[email protected]> wrote: > > He is the GWT code: > > > > public abstract class DB_Conn { > > > > private String url; > > > > public DB_Conn() { > > > > url = "jdbc:mysql://xxxxxxxxxxxxxxx:3306/"; > > } > > > > protected Connection getConn() { > > > > Connection conn = null; > > > > String url = getServerURL(); > > > > String db = "xxxxx"; > > String driver = "com.mysql.jdbc.Driver"; > > String user = "xxxxx"; > > String pass = "xxxxx"; > > > > try { > > > > Class.forName(driver).newInstance(); > > conn = DriverManager.getConnection(url+db, > > user, pass); > > > > } catch (Exception e) { > > > > System.err.println("Mysql Connection Error: > > "); > > e.printStackTrace(); > > } > > > > return conn; > > } > > > > private String getServerURL() { > > return url; > > } > > > > protected static int getResultSetSize(ResultSet resultSet) { > > int size = -1; > > > > try { > > resultSet.last(); > > size = resultSet.getRow(); > > resultSet.beforeFirst(); > > } catch(SQLException e) { > > return size; > > } > > > > return size; > > } > > > > } > > > > On 8 mar, 19:13, Fran <[email protected]> wrote: > > > > > > > > > help me please! :( > > > > > On 8 mar, 14:40, Fran <[email protected]> wrote: > > > > > > I cant understand what is the problem :( > > > > > > is possible a problem with iptables? > > > > > > On 8 mar, 01:27, Fran <[email protected]> wrote: > > > > > > > Hi, > > > > > > > I have a problem with a tomcat and MySQL driver. > > > > > > > If I use a tomcat instalation in Windows, it works fine. > > > > > If I put the aplication in a production server (Linux centoos), It > > > > > dont work. > > > > > This is the output of catalina.out > > > > > > > Mysql Connection Error: > > > > > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: > > > > > Communications link failure > > > > > > > The last packet sent successfully to the server was 0 milliseconds > > > > > ago. The driver has not received any packets from the server. > > > > > > > Anyone know this problem? Help me please! > > > > > > > Thanks > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-web-toolkit%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
