MySQL - JDBC Connectivity

Hello,
I built a small web app that reads and writes to a MySQL db via a servlet. This application worked fine on my dev box, but when I moved it to a staging machine it would not connect to the MySQL server on the staging box. After much frustration and not being able to figure up from down, I wrote another test app that did nothing but connect to a MySQL db and return success/fail message. I got the same behavior from this app -- it will connect to a local MySQL db on my dev system (WinXP), on another linux box but not on the staging server.
Now, the kicker is that if I run either of these applications on one of the other systems, and set the db URL to the staging server instance of MySQL, I can connect and update/read the database there. So, it's just something wrong with my configuration in my deployment on the staging server that prevents the apps from connecting to the MySQL server locally on that one system.
The exception that is returned from a failed connection is "Communication link failure." I can't find anything useful about my case through searches.
AFAICS, the installations of MySQL on the two linux systems are identical -- both canned installs for Ubuntu 7.1 via package manager. Yet, one works, the other doesn't.
Test system: MySQL 5.0.45-Debian_1ubuntu3.3-log (works), Tomcat 6.0.16 (also tested with 6.0.14)
Staging: MySQL 5.0.45-Debian_1ubuntu3.3-log (doesn't work), Tomcat 5.5
OS on both: Linux 2.6.22-15-generic/Ubuntu 7.1
I guess the summary is,
dbUrl="jdbc:mysql://ellen:3306/fundraiser" will work for db connectivity if I am running the application on any system other than ellen. (Also, note that I tried deploying with a substitution of "localhost" for "ellen" in the URL and it did not work.)
I'm hoping somebody can point me in the right direction, as I'm out of ideas for troubleshooting.
Thanks.
mp

Hello,
Following is the output from getStackTrace().
Thanks.
mp
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:513)
com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2104)
com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:729)
com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:46)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:513)
com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:283)
java.sql.DriverManager.getConnection(DriverManager.java:582)
java.sql.DriverManager.getConnection(DriverManager.java:185)
net.homelinux.servlet.JdbcTest.processRequest(JdbcTest.java:55)
net.homelinux.servlet.JdbcTest.doGet(JdbcTest.java:92)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:262)
org.apache.catalina.core.ApplicationFilterChain.access$0(ApplicationFilterChain.java:192)
org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:171)
java.security.AccessController.doPrivileged(Native Method)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:167)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
java.lang.Thread.run(Thread.java:619)

Similar Messages

MySQL -- JDBC Connection help !!!

Hi everybody...Well I have MySQL Server and Java, I get the JDBC and tried this:
import java.sql.*;
public class JdbcE {
public static void main(String args[]) {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql://localhost/test", "user", "pass");
if(!con.isClosed())
System.out.println("Successfully connected to MySQL server...");
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
} finally {
try {
if(con != null)
con.close();
} catch(SQLException e) {}
And with that code all works fine...but when I change the Host from LOCALHOST to [ROUTER IP] like this:
con = DriverManager.getConnection("jdbc:mysql://182.185.145.12/test", "user", "pass");
I got this exception:
Exception: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection timed out: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection timed out: conne
ct
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.ja
va:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java
:266)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at JdbcE.main(JdbcE.java:11)
** END NESTED EXCEPTION **
Last packet sent to the server was 16 ms ago.
I don't know how to solve it...
I have a 2wire 1700HG router, maybe it would be a problem of the firewall can anyone help me to solve this problem??

Well I sorry...I am very new in this kind of things...I just know that I have a 2wire 1700HG, I have installed MySQL Server, Java and mysql-connector-java...
When I try this in the connection statement:
con = DriverManager.getConnection("jdbc:mysql://localhost/test", "user", "test");
Everything works fine...but when I try this to connect from a remote PC
con = DriverManager.getConnection("jdbc:mysql://189.145.185.182/test", "user", "test");
This error comes out on screen:
Exception: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection timed out: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection timed out: conne
ct
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.ja
va:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java
:266)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at JdbcE.main(JdbcE.java:11)
** END NESTED EXCEPTION **
Last packet sent to the server was 16 ms ago.
I don't know what can I do :S please help!! :D

Why my MySQL JDBC Connect fail??

Dear friends:
I have following code:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class JdbcExample2 {
public static void main(String args[]) {
    Connection con = null;
    try {
      Class.forName("com.mysql.jdbc.Driver").newInstance();
      //jdbc:mysql://host_name:port/dbname
//     con = DriverManager.getConnection("jdbc:MySQL:///test","admin", "admin");
      con = DriverManager.getConnection("jdbc:MySQL://localhost:3306/test","admin", "admin");
      if(!con.isClosed())
        System.out.println("Successfully connected to " +
          "MySQL server using TCP/IP...");
    } catch(Exception e) {
      System.err.println("Exception: " + e.getMessage());
    } finally {
      try {
        if(con != null)
          con.close();
      } catch(SQLException e) {}
}But when I run , I got following error:
Exception: com.mysql.jdbc.Driver
My question is:
[1]. when I connect to MySQL Server through mySQL Client, I got
Enter password: *****
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 18 to server version: 4.1.21-community-nt
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>
how Can I determine MySQL Server name?? I forgot when I install, maybe MySQL is my SQL Server name
[2]. Do I need to creat a user DSN name or System DSN name for MySQL Server?? which one is best??
How to do it??
[3]. How to make above simple JDBC program runnable??
Thanks
sunny
Message was edited by:
sunnymanman

Thanks, see new errors:
C:\Project\java>java Jdbc11
Copyright 2004, R.G.Baldwin
java.sql.SQLException: Access denied for user 'admin'@'localhost' (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:946)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:868)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3340)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1238)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2743)
at com.mysql.jdbc.Connection.<init>(Connection.java:1553)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at Jdbc11.main(Jdbc11.java:23)
C:\Project\java>
any idea??
here Jdbc11.java:23 is:
Connection con = DriverManager.getConnection(
url,"admin", "YES");
my userID/Password = admin/admin;
sunny
Message was edited by:
sunnymanman

MySql JDBC connection classdef not found

Hello there i am currently trying to connect a mysql database to my project. I am using Jbuilder5 enterprise . Currently i have tables setup using MySQL and i can connect to them using the database pilot. Yet when i try to access the database using java code i get a classdefnot found at event dispatch. Can anyone tell me where i am going wrong?

No, don't put that JAR or any other in that directory. That's for language extensions (e.g., packages that begin with "javax") only.
The MySQL JAR should be closer to your class files, IMO. Then you have to add it to the CLASSPATH according to JBuilder's conventions.
I use a standard directory structure for all my apps. At the top level is a directory for the application. Under a directory named "source" where I put all the code that comes out of the version control system. Under that I'll have different directories (e.g., "java" for Java source files, "lib" for 3rd party JARs like your MySQL JDBC JAR, etc.)
I create another directory "build" under the application directory where all the generated stuff goes, like .class files, javadocs, JUnit reports, etc.
This lets me use a common Ant build file to build my apps and keeps everything together. I just all all the JARs in my "lib" directory when I compile the code. I'd recommend organizing your apps this way, too.
MOD

MySQL JDBC connection error

Hi!
I am trying to conect to MySql database form a jsp page, but I get error. I am using the following:
1. MySql dababase installed in C:/mysql
2. Tomcat installed in c:/tomcat
3. JDBC driver "mm.mysql-2.0.14-bin.jar" installed in c:\tomcat\lib
Here is my code:
<%@ page import="java.sql.*" %>
<%
String connectionURL = "jdbc:mysql://localhost:3306/gixpro1?user=username&password=pwd";
Connection connection = null;
Statement statement = null;
ResultSet rs = null;
%>
<html><body>
<%
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");
statement = connection.createStatement();
rs = statement.executeQuery("SELECT * FROM gixpro1");
while (rs.next()) {
out.println(rs.getString("name")+"<br>");
rs.close();
%>
</body></html>
Here is my error:
Internal Servlet Error:
javax.servlet.ServletException: org.gjt.mm.mysql.Driver
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:462)
at jsp.test_4._jspService(test_4.java:89)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:570)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:481)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:484)
Root cause:
java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
at org.apache.tomcat.util.depend.DependClassLoader12Impl.loadClassInternal1(DependClassLoader12.java:240)
at org.apache.tomcat.util.depend.DependClassLoader12Impl$1.run(DependClassLoader12.java:109)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.tomcat.util.depend.DependClassLoader12Impl.loadClass(DependClassLoader12.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120)
at jsp.test_4._jspService(test_4.java:68)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:570)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:481)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:484) at org.apache.tomcat.util.depend.DependClassLoader12Impl$1.run(DependClassLoader12.java:109)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.tomcat.util.depend.DependClassLoader12Impl.loadClass(DependClassLoader12.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120)
at jsp.test_3._jspService(test_3.java:69)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:570)
at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
at org.apache.tomcat.core.Handler.service(Handler.java:235)
at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:481)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:484)

Hi!
I also have the same problem (I also test the sample in this case but still got the same error. When I use a standard java client then I can acess mySQL database without any problem, this just occurs when trying to access the database from a JSP page.
CLASSPATH=
C:\Program\RDBMS\mySQL\mysql-connector-java-2.0.14\mysql-connector-java-2.0.14-bin.jar
Please need som advice on this.
Regards
Tobbe
See errormessage below
javax.servlet.ServletException: org.gjt.mm.mysql.Driver
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:463)
at org.apache.jsp.TestMySQL$jsp._jspService(TestMySQL$jsp.java:91)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
root cause
java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1320)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1169)

Java Connector via MySQL [ Cannot Connect ]

I downloaded the MySql connector and extracted the connector and placed it at this directory,
C:\Program Files\Java\jdk1.5.0_06\jre\lib\ext
I also set the classpath as such by adding
ClassPath = .;C:\Program Files\Java\jdk1.5.0_06\jre\lib\ext\mysql-connector-java-3.1.12-bin.jar.Actually , I followed the tutorial at
http://www.stardeveloper.com/articles/display.html?article=2003090201&page=4.
I then executed this program below.
import java.sql.*;
public class Connect {
public static void main(String args[]) {
    Connection con = null;
    try {
     Class.forName("com.mysql.jdbc.Driver").newInstance();
     con = DriverManager.getConnection("jdbc:mysql:///enron", "root", "horizon");
      if(!con.isClosed())
        System.out.println("Successfully connected to MySQL server...");
    } catch(Exception e) {
      System.err.println("Captured Exception: " + e.getMessage());
    } finally {
      try {
        if(con != null)
          con.close();
      } catch(SQLException e) {}
However i was unable to connect..This is wat happened as below..
C:\>java Connect
Captured Exception: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.UnknownHostException
MESSAGE: localhost: localhost
STACKTRACE:
java.net.UnknownHostException: localhost: localhost
        at java.net.InetAddress.getAllByName0(Unknown Source)
        at java.net.InetAddress.getAllByName0(Unknown Source)
        at java.net.InetAddress.getAllByName(Unknown Source)
        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:137)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:284)
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:2555)
        at com.mysql.jdbc.Connection.<init>(Connection.java:1485)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at Connect.main(Connect.java:7)
** END NESTED EXCEPTION **
Last packet sent to the server was 31 ms ago.
Any Help watsoever is greatly appreciated.
Thanks in advance.
Cheers.

Hi thanks for the reply.
Although , I am though a bit baffled by your reply.
Where is it that you want me to add the URL.Not add the URL - change the one you have. Read the docs for the connector and follow that.
And where else should i place that jar file.I put it in my CLASSPATH, close to where the source for my project is. (That means not in one place, but several places. I duplicate the JAR file for every app that needs it.)
Cos I follow the tutorial at...
http://www.stardeveloper.com/articles/display.html?art
icle=2003090201&page=4.
Unless You are saying that the above site is wrong..
If thats the case, can you point out another
alternative site which can guide me along .No time to read that site, nor do I have the interest.
The Sun Java tutorial is sufficient for using JDBC. As far as how you package and deploy apps, that's another matter. You should be using the class name and URL that your JDBC driver docs suggest.
%

Mysql not connecting

Hi all
I have downloaded the J connector, both 5.0.8 and 5.1.13 but they both gives me problems.
if i try:
private static String url="jdbc:mysql://localhost:3306/mydb;create=true"; private static Connection conn=null; private Statement stm=null; public static void main(String[] args){ createConnection(); } private static void createConnection(){ try{ Class.forName("com.mysql.jdbc.Driver").newInstance(); //connect conn=DriverManager.getConnection(url); System.out.println("Connected!"); } catch(Exception except){ except.printStackTrace(); } }
i get the following:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.ConnectException
MESSAGE: Connection refused
STACKTRACE:
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:433)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:477)
at java.net.Socket.<init>(Socket.java:374)
at java.net.Socket.<init>(Socket.java:216)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:271)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2771)
at com.mysql.jdbc.Connection.<init>(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:193)
at conn.Conn.createConnection(Conn.java:28)
at conn.Conn.main(Conn.java:18)

private static String url="jdbc:mysql://localhost:3306/mydb;create=true";
java.net.ConnectException
MESSAGE: Connection refusedMySQL is not running in 'localhost' on port 3306.

Java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1956)

Hi,All
Need Help regarding the exception.
As i tried so many way to solve this problem but cound'nt find out the solution.!!! If i restart the server then this error is resolved but for the some time.,after 4-5 hour again i need to restart the server.
so please help me out from this problem!!!!!!
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: #{cityf.OrderToConsumerCity}: javax.faces.el.EvaluationException: org.hibernate.exception.JDBCConnectionException: could not execute query
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:225)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
root cause
javax.faces.FacesException: #{cityf.OrderToConsumerCity}: javax.faces.el.EvaluationException: org.hibernate.exception.JDBCConnectionException: could not execute query
     com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:98)
     javax.faces.component.UICommand.broadcast(UICommand.java:332)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
root cause
javax.faces.el.EvaluationException: org.hibernate.exception.JDBCConnectionException: could not execute query
     com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:150)
     com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     javax.faces.component.UICommand.broadcast(UICommand.java:332)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
root cause
org.hibernate.exception.JDBCConnectionException: could not execute query
     org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
     org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
     org.hibernate.loader.Loader.doList(Loader.java:2223)
     org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
     org.hibernate.loader.Loader.list(Loader.java:2099)
     org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:912)
     org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
     org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
     org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
     com.etelic.dao.ConsumerDAOHibernate.getCityList(ConsumerDAOHibernate.java:153)
     com.etelic.controller.City.OrderToConsumerCity(City.java:286)
     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     java.lang.reflect.Method.invoke(Unknown Source)
     com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     javax.faces.component.UICommand.broadcast(UICommand.java:332)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
root cause
com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error:
** BEGIN NESTED EXCEPTION **
com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
java.io.EOFException
     at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1956)
     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2368)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2867)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:3255)
     at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1293)
     at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1428)
     at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
     at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
     at org.hibernate.loader.Loader.doQuery(Loader.java:674)
     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
     at org.hibernate.loader.Loader.doList(Loader.java:2220)
     at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
     at org.hibernate.loader.Loader.list(Loader.java:2099)
     at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:912)
     at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
     at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
     at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
     at com.etelic.dao.ConsumerDAOHibernate.getDelhiLocalityListByPincode(ConsumerDAOHibernate.java:116)
     at com.etelic.bo.ConsumerBO.getDelhiLocalityListByPincode(ConsumerBO.java:44)
     at com.etelic.manager.ConsumerManager.getDelhiLocalityList(ConsumerManager.java:38)
     at com.etelic.controller.ConsumerSearchParametersInput.search(ConsumerSearchParametersInput.java:275)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     at javax.faces.component.UICommand.broadcast(UICommand.java:332)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
     at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
Last packet sent to the server was 15 ms ago.
STACKTRACE:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
*java.io.EOFException*
*     at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1956)*     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2368)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2867)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:3255)
     at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1293)
     at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1428)
     at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
     at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
     at org.hibernate.loader.Loader.doQuery(Loader.java:674)
     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
     at org.hibernate.loader.Loader.doList(Loader.java:2220)
     at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
     at org.hibernate.loader.Loader.list(Loader.java:2099)
     at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:912)
     at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
     at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
     at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
     at com.etelic.dao.ConsumerDAOHibernate.getDelhiLocalityListByPincode(ConsumerDAOHibernate.java:116)
     at com.etelic.bo.ConsumerBO.getDelhiLocalityListByPincode(ConsumerBO.java:44)
     at com.etelic.manager.ConsumerManager.getDelhiLocalityList(ConsumerManager.java:38)
     at com.etelic.controller.ConsumerSearchParametersInput.search(ConsumerSearchParametersInput.java:275)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     at javax.faces.component.UICommand.broadcast(UICommand.java:332)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
     at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
Last packet sent to the server was 15 ms ago.
     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2579)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2867)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:3255)
     at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1293)
     at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1428)
     at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
     at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
     at org.hibernate.loader.Loader.doQuery(Loader.java:674)
     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
     at org.hibernate.loader.Loader.doList(Loader.java:2220)
     at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
     at org.hibernate.loader.Loader.list(Loader.java:2099)
     at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:912)
     at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
     at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
     at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
     at com.etelic.dao.ConsumerDAOHibernate.getDelhiLocalityListByPincode(ConsumerDAOHibernate.java:116)
     at com.etelic.bo.ConsumerBO.getDelhiLocalityListByPincode(ConsumerBO.java:44)
     at com.etelic.manager.ConsumerManager.getDelhiLocalityList(ConsumerManager.java:38)
     at com.etelic.controller.ConsumerSearchParametersInput.search(ConsumerSearchParametersInput.java:275)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     at javax.faces.component.UICommand.broadcast(UICommand.java:332)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
     at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **
     com.mysql.jdbc.SQLError.createSQLException(SQLError.java:888)
     com.mysql.jdbc.Connection.checkClosed(Connection.java:1931)
     com.mysql.jdbc.Connection.prepareStatement(Connection.java:4720)
     com.mysql.jdbc.Connection.prepareStatement(Connection.java:4686)
     org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:505)
     org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:423)
     org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
     org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
     org.hibernate.loader.Loader.doQuery(Loader.java:673)
     org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
     org.hibernate.loader.Loader.doList(Loader.java:2220)
     org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
     org.hibernate.loader.Loader.list(Loader.java:2099)
     org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:912)
     org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
     org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
     org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
     com.etelic.dao.ConsumerDAOHibernate.getCityList(ConsumerDAOHibernate.java:153)
     com.etelic.controller.City.OrderToConsumerCity(City.java:286)
     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     java.lang.reflect.Method.invoke(Unknown Source)
     com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92)
     javax.faces.component.UICommand.broadcast(UICommand.java:332)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
     org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:346)
     com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
     org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.
Apache Tomcat/6.0.14-Thanks and regards
Praveen Soni

Hey BalusC
As i already obtain a new session object from sessionfactory,for one or more transactions at once(!),
For reference see below code:
package com.dao>hibenateUtil;
import java.util.*;
import com.ConsumerRecord;
public class ConsumerDAOHibernate implements IConsumerDAO {
     public Long getNumberMatchingQuery(ConsumerRecord upr){
         String query = new String();
        String queryStart = "select count(*) FROM person in CLASS com.ConsumerRecord";
        query += queryStart;
        org.hibernate.Query q = HibernateUtil.getSession().createQuery(query);
        return (Long)q.uniqueResult();
    public Long getNumberMatchingCity(ConsumerRecord upr){
         String query = new String();
        String queryStart = "select count(*) FROM city in CLASS com.ConsumerRecord";
        query += queryStart;
        org.hibernate.Query q = HibernateUtil.getSession().createQuery(query);
        return (Long)q.uniqueResult();
Hibernate Util:-package com.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import org.apache.log4j.Logger;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
    private static final SessionFactory sessionFactory;
    private static Session session = null;
    private static Logger logger = Logger.getLogger(HibernateUtil.class.getName());
    static {
        try {
            /** TODO: change to IOC w/ datasource */
            Configuration conf = new Configuration();
            sessionFactory = conf.configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
    public static Session getSession() {
        if(session == null){
            try {
                session = sessionFactory.openSession();
                logger.debug("****************************new session being created**************************************");
                           //sessionFactory.
            } catch (Throwable ex) {
                // Make sure you log the exception, as it might be swallowed
                System.err.println("Initial SessionFactory creation failed." + ex);
                throw new ExceptionInInitializerError(ex);
        return session;
    }

How to fix jdbc connection when SQLstate 08S01

I have an application that connects to and insert into a remote database which runs on a server I connect to over the internet. I tested it on local server (localhost) and it works fine, but when I put my server IP (72.52.155.111) or web domain I can' t connect. I'm not sure what should I write instead localhost: webdomain or something else ?
Java code...
conn =   DriverManager.getConnection("jdbc:mysql://72.52.155.111:3306/fritaor_apartmani" ,"fritaor_root","10000000");
...Error code:
SQLException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection timed out: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection timed out: conne
ct
        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.ja
va:156)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:2666)
        at com.mysql.jdbc.Connection.<init>(Connection.java:1531)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java
:266)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at Mysql.save(Mysql.java:57)
        at Contact.run(Contact.java:299)
        at Testing.main(Testing.java:21)
** END NESTED EXCEPTION **
Last packet sent to the server was 47 ms ago.
SQLState: 08S01
VendorError: 0

Try to connect to the server in another way (such as telnet). See if you can connect to port 3306. If not, the port is blocked or there's nobody listening (is there a mysql server running on the host?).

Mysql JDBC error

<%@ page import = "java.io.*, java.util.*,java.net.URL,java.awt.*,java.lang.*,java.sql.*" %>
<HTML>
<head></head>
<body>
<%
    ResultSet rs;
     Statement stmt;
     try {
          Class.forName("com.mysql.jdbc.Driver").newInstance();
          Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/petrofed?user=petrofed&password=petro");
     String sql = "SELECT * FROM sample";
     stmt = conn.createStatement();
     rs = stmt.executeQuery(sql);
     while (rs.next())
          out.println(rs.getString(1));
          out.println(rs.getString(2));
             // Do something with the Connection
         } catch (SQLException ex) {
             // handle any errors
             out.println("SQLException: " + ex.getMessage());
             out.println("SQLState: " + ex.getSQLState());
             out.println("VendorError: " + ex.getErrorCode());
         catch (ClassNotFoundException cnfex)
                       out.println("SQLException: " + cnfex.getMessage());
%>
</body>
</html>
Getting following error after uploading it on the Server
SQLException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.security.AccessControlException MESSAGE: access denied (java.net.SocketPermission localhost resolve) STACKTRACE: java.security.AccessControlException: access denied (java.net.SocketPermission localhost resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269) at java.security.AccessController.checkPermission(AccessController.java:401) at java.lang.SecurityManager.checkPermission(SecurityManager.java:524) at java.lang.SecurityManager.checkConnect(SecurityManager.java:1023) at java.net.InetAddress.getAllByName0(InetAddress.java:1000) at java.net.InetAddress.getAllByName0(InetAddress.java:981) at java.net.InetAddress.getAllByName(InetAddress.java:975) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:133) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:281) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1696) at com.mysql.jdbc.Connection.(Connection.java:408) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:270) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:193) at org.apache.jsp.mysqldb2_jsp._jspService(mysqldb2_jsp.java:59) at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.jasper.servlet.JspServletWrapper.service(Unknown Source) at org.apache.jasper.servlet.JspServlet.serviceJspFile(Unknown Source) at org.apache.jasper.servlet.JspServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.access$0(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619) at java.lang.Thread.run(Thread.java:534) ** END NESTED EXCEPTION ** SQLState: 08S01 VendorError: 0

Tomcat is running with a Java security manager that doesn't let your application connect via sockets to applications outside Tomcat. You could perhaps fix this by configuring Tomcat with a security policy that does permit that, but don't ask me how to do that. I would fix the problem by using connection pools that are (I believe) built into Tomcat.

Com.mysql.jdbc.MysqlDataTruncation: Data truncation

Hi, i have these error
com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value adjusted for column 'longtitude' at row 1
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2932)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3255)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1293)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1566)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1480)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1465)
at dao.PlacemarkDAO.add(PlacemarkDAO.java:52)
at web.AddPlacemarkServlet.processRequest(AddPlacemarkServlet.java:70)
at web.AddPlacemarkServlet.doGet(AddPlacemarkServlet.java:86)
in my database, i have declare longtitude as double(255,30) but i still dont know why got error data truncation? Can anyone please guide me?

hmm, i have sloved the error already. I have make my longtitude double(40,20).

JDBC connection timing out

Hello all,
The problem i am faced with is this. I am working on developing a program that lets me upload pictures as byte streams to a mysql database and then retrieves them in the form of a slide show. I have developed other programs that connect to mysql and update delete query etc. without any connection problems. When i go to test the code i have just written i am only able to test about 2-3 times before i get the following error. I then have to restart the mysql server and my testing pc also to regain another 2-3 testing connections. I am using InputStreams and ByteArrayOutputStreams and closing both when done with them. My other programs do not use prepared statements for queries and update but this one does(may prepared statement problem ??) but i am at a loss as it gets real old to have to reboot ever 15 minutes both pc's. Please any advice would be greatly appreciated
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.ConnectException: Connection timed out: connect
STACKTRACE:
java.net.SocketException: java.net.ConnectException: Connection timed out: connect
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:284)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2555)
at com.mysql.jdbc.Connection.<init>(Connection.java:1485)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at databasePhoto.DatabaseUtility.login(DatabaseUtility.java:45)
at databasePhoto.Test.<init>(Test.java:24)
at databasePhoto.Test.main(Test.java:46)
** END NESTED EXCEPTION **
Last packet sent to the server was 0 ms ago.
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2621)
at com.mysql.jdbc.Connection.<init>(Connection.java:1485)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at databasePhoto.DatabaseUtility.login(DatabaseUtility.java:45)
at databasePhoto.Test.<init>(Test.java:24)
at databasePhoto.Test.main(Test.java:46)

Disregard i have figured it out. For some reason using the ip address for the host causes me problems. I changed to the server name and it works great no probs

Conecting to mysql database Connection reset by peer

hi guys,
I have to connec to sever where , from this place i need to contact a remote database , the databse is behind a firewall , they database in their intranet ,they have give me a valid ip , they have a conection between the valid ip and the intranet system , they give me access to the port in the fire wall , i asked for the port 3306 (mysql default ) port , and tried connecting it but i get exception, should i need to get the 80 port for connection??? please help
java.sql.SQLException: Communication link failure: java.net.SocketException, underlying cause: Connection reset by peer: Connection reset by peer ** BEGIN NESTED EXCEPTION ** java.net.SocketException MESSAGE: Connection reset by peer: Connection reset by peer STACKTRACE: java.net.SocketException: Connection reset by peer: Connection reset by peer at java.net.SocketInputStream.socketRead(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:86) at java.io.BufferedInputStream.fill(BufferedInputStream.java:186) at java.io.BufferedInputStream.read1(BufferedInputStream.java:225) at java.io.BufferedInputStream.read(BufferedInputStream.java:280) at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1391) at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1413) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:625) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1782) at com.mysql.jdbc.Connection.(Connection.java:450) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:411) at java.sql.DriverManager.getConnection(DriverManager.java:517) at java.sql.DriverManager.getConnection(DriverManager.java:199) at org.apache.jsp.store$jsp._jspService(store$jsp.java:107) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java: 201) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 243) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 190) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.jav a:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:17 4) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:458) at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:551) at java.lang.Thread.run(Thread.java:484) ** END NESTED EXCEPTION **

yeahman i feel the same, but i need to prove them they need to do some work , for that i should show thm its not my problem , can u tell me how the jdbc connector works,or any other way telling them , the port not opened still , how will the server pass the request to the database , some one please help me

Connection mysql jdbc error ?

I have program java likes this :
import java.sql.*;
public class LoadDriver {
    // Define the JDBC Driver and the database connection URL
    public static final String DRIVER = "com.mysql.jdbc.Driver";
    public static final String URL = "jdbc:mysql://localhost/java?user=test&password=test";
    public static void main(String args[]) {
        Connection conn = null;
Statement select = null;
ResultSet result = null;
        try {
            // load the driver dynamically
            Class.forName(DRIVER);
            // connect to the database
            conn = DriverManager.getConnection(URL);
            // perform a query. first create a Statement object from the connection
            select = conn.createStatement();
// next execute a query (SQL string) and return the results in a ResultSet object
            result = select.executeQuery("select fname, lname from names order by lname, fname");
            // print out the results
            while(result.next()) {
                String fname = result.getString("fname"); // note these match the columns in the
                String lname = result.getString("lname"); // SELECT statement (fname, lname)
                System.out.println(fname+" "+lname);
// check if there was a problem executing the SQL statement
        catch (SQLException e) {
            System.err.println("SQL Exception: "+e.getMessage());
            System.exit(1);
// if the JDBC driver is not in the CLASSPATH
        catch (ClassNotFoundException e) {
            System.err.println("Class not found: "+e.getMessage());
            System.exit(1);
// catch any other exceptions
        catch (Exception e) {
            System.err.println("Other Exception: ");
            System.err.println(e.getMessage());
            System.exit(1);
// You want to close the connections no matter what happens!
finally {
try {
// close the result, query, and database connection
if (result != null) result.close();
             if (select != null) select.close();
            if (conn != null) conn.close();
catch (SQLException e) {
// one of the new cases where it's OK to just eat exceptions or at the most log them
System.err.println("Error closing connection: "+e.getMessage());
but i get errror likes this :
D:\Program Files\Java\jdk1.5.0_03\bin>javac LoadDriver.java
D:\Program Files\Java\jdk1.5.0_03\bin>java LoadDriver
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Sign
ature
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at LoadDriver.main(LoadDriver.java:20)
D:\Program Files\Java\jdk1.5.0_03\bin>
I place mysql.jar in
- D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext
- D:\Program Files\Java\jdk1.5.0_03\lib
- D:\Program Files\Java\jdk1.5.0_03\jre\lib
and i make classpath to D:\Program Files\Java\jdk1.5.0_03\bin;D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext\
but it still doesn't work
What must I do ?
Thx 4 your reply

Hello!
I'm getting this same error message and i followed the code example as close as i could:
Thanks for any help on this!
bk
set oldpath=%PATH%
set JAVA_HOME=C:\jdk1.5.0_02
set ANT_HOME=C:\ANT\apache-ant-1.6.5
set PATH=C:\jdk1.5.0_02\bin;%ANT_HOME%\bin
set CLASSPATH=.;C:\jdk1.5.0_02\lib;C:\MYSQL\mysql-connector-java-3.1.10\src\com\;C:\MYSQL\mysql-connector-java-3.1.10\src\org\;C:\MYSQL\mysql-connector-java-3.1.10\mysql-connector-java-3.1.10-bin-g.jar;
http://www.developer.com/java/data/article.php/3417381#Critical_steps_in_using_JDBC
import java.sql.*;
public class Jdbc11 {
public static void main(String args[]){
    System.out.println(
                  "Copyright 2004, R.G.Baldwin");
    try {
      Statement stmt;
      //Register the JDBC driver for MySQL.
      Class.forName("com.mysql.jdbc.Driver");
      //Define URL of database server for
      // database named mysql on the localhost
      // with the default port number 3306.
      String url =
            "jdbc:mysql://localhost:3306/mysql";
      //Get a connection to the database for a
      // user named root with a blank password.
      // This user is the default administrator
      // having full privileges to do anything.
      Connection con =
                     DriverManager.getConnection(
                                 url,"root", "");
      //Display URL and connection information
      System.out.println("URL: " + url);
      System.out.println("Connection: " + con);
      //Get a Statement object
      stmt = con.createStatement();
      //Create the new database
      stmt.executeUpdate(
                       "CREATE DATABASE JunkDB");
      //Register a new user named auser on the
      // database named JunkDB with a password
      // drowssap enabling several different
      // privileges.
      stmt.executeUpdate(
          "GRANT SELECT,INSERT,UPDATE,DELETE," +
          "CREATE,DROP " +
          "ON JunkDB.* TO 'auser'@'localhost' " +
          "IDENTIFIED BY 'drowssap';");
      con.close();
    }catch( Exception e ) {
      e.printStackTrace();
    }//end catch
}//end main
}//end class Jdbc11
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Signature

Weblogic 7.0 , MySQL 3.23 JDBC Connection Pools

i am using weblogic 7.0 and MySQL 3.23 and right now my objective is to create,
configure and test a JDBC
connection pool using the Administrative console.
Here is what i have done till now
- set the classpath of the MySQL driver in the startWLS.cmd like this
SET MYSQL_DRIVER=C:\mysqldriver\mysql-connector-java-2.0.14\mysql-connector-java-2.0.14-bin.jar
set CLASSPATH=%MYSQL_DRIVER%;%CLASSPATH%
- using the weblogic administrative console i have created a new connection pool
named as
testpool.
- Here is what i have in the testpool general tab
Name: testpool
URL: jdbc:mysql//localhost:3306/test (test is the name of the database in mysql)
Driver Classname: org.gjt.mm.mysql.Driver
I have not entered any Properties, ACL Name, Password or Open String Password.
- Now i go the the Testing tab and enter a name of a table in my test database
and click on Apply
and on the command window i am getting the following exception
java.sql.SQLException No suitable driver
Thanks in advance,
Ashish

Thanks a lot Slava. After reading your mail and the post i was able to get it working.
"Slava Imeshev" <[email protected]> wrote:
Hi Ashish,
I figured out what's the problem. URL in the connection pool
definition is malformed. It's
jdbc:mysql//localhost:3306/test
while the correct one should have colon after mysql:
jdbc:mysql://localhost:3306/test
Regards,
Slava Imeshev
"Ashish Sureka" <[email protected]> wrote in message
news:[email protected]...
I am sorry, the program that i posted here is not comming properlyformatted but
i am able to run a simple java program that connects to MySQL and alsoa
servlet
that connects to the MySQL. The only problem i am having is includingthe
MySQL
driver jar files to the weblogic server classpath.
Thanks,
Ashish.
"Ashish Sureka" <[email protected]> wrote:
Hello Joseph Weinstein,
Actually, i already tried the same approach that you have mentioned
in
your reply
before i posted my message here. Following is the program that i use
to check
MySQL connection.
import java.sql.*;
public class MySQLConnect
public static void main(String[] args) throws Exception
try {
Class.forName ( "org.gjt.mm.mysql.Driver" );
System.out.println ( "MySQL Driver Found" );
} catch ( java.lang.ClassNotFoundException e ) {
System.out.println("MySQL JDBC Driver not found ... ");
throw ( e );
String url = "";
Connection con = null;
try {
url = "jdbc:mysql://" + "localhost:3306" + "/" + "test";
con = DriverManager.getConnection(url);
System.out.println("Connection established to " + url + "");
} catch ( java.sql.SQLException e ) {
System.out.println("Connection couldn't be established to " + url);
String sqlStatement = "SELECT * FROM testtable";
try {
Statement s = con.createStatement();
s.execute (sqlStatement);
s.close ( );
} catch ( SQLException e ) {
System.out.println ( "Error executing sql statement" );
con.close();
The classpath that i use to run this program is
SET PATH=C:\bea\jdk131_03\bin
SETCLASSPATH=C:\bea\jdk131_03\jre\lib\rt.jar;C:\bea\weblogic700\ebcc\lib\ext\se
rvlet.jar;C:\CSC413\Demos\HelloApp\HelloAppJAR
SET CLASSPATH=%CLASSPATH%;C:\bea\weblogic700\server\lib\weblogic.jar
SETMYSQL_DRIVER=C:\mysqldriver\mysql-connector-java-2.0.14\mysql-connector-java
-2.0.14-bin.jar
set CLASSPATH=.;%MYSQL_DRIVER%;%CLASSPATH%
I have also written a Servlet which checks the MySQL connection. For
the servlet
i added the MySQL driver jar files in the WEB-INF/lib directory ofthe
servlet
web application and it is working fine.
do you want me to attach the startWLS.cmd file that i changed to include
the MySQL
driver classpath.
Thanks for your replies,
Ashish.
Joseph Weinstein <[email protected]> wrote:
Ashish Sureka wrote:
When i start the weblogic server using the command prompt by executingthe startWLS.cmd,
i can see the classpath the server is using on the command window
and
that includes
the jar file for the MySQL driver but still it is throwing a
SQLException
and
saying that No Suitable driver.
How do i include a external library or jar file on the weblogic
server's
classpath.
is there a specific directory where i should put the MySQL driver
jar
file .
Thanks,
Ashish.No. Let's simplfy the problem. Please run a tiny standalone Java
program
that
just makes a JDBC connection to your MySQL DBMS, with no weblogic
code in the picture. When you succeed at this, show me the CLASSPATH
and
PATH of the shell that ran the program successfully, and show methe
few lines
of code that made the connection. Then we will know the problem.It
may
be that
the URL you're passing to the pool is not exactly correct for that
driver.
Joe
Joseph Weinstein <[email protected]> wrote:
Ashish Sureka wrote:
i am using weblogic 7.0 and MySQL 3.23 and right now my objective
is
to create,
configure and test a JDBC
connection pool using the Administrative console.
Here is what i have done till now
- set the classpath of the MySQL driver in the startWLS.cmd
like
this
SET
MYSQL_DRIVER=C:\mysqldriver\mysql-connector-java-2.0.14\mysql-connector-java
-2.0.14-bin.jar
set CLASSPATH=%MYSQL_DRIVER%;%CLASSPATH%
- using the weblogic administrative console i have created anew
connection
pool
named as
testpool.
- Here is what i have in the testpool general tab
Name: testpool
URL: jdbc:mysql//localhost:3306/test (test is the name of
the
database
in mysql)
Driver Classname: org.gjt.mm.mysql.Driver
I have not entered any Properties, ACL Name, Password or
Open
String
Password.
- Now i go the the Testing tab and enter a name of a table in
my
test
database
and click on Apply
and on the command window i am getting the following exception
java.sql.SQLException No suitable driverWatch the first lines that the server prints out when the script
starts
it. The script
shows the classpath that was constructed for the server. It is
likely
that you need
to do something else to ensure your driver is really in the classpath
the server uses.
Joe
Thanks in advance,
Ashish

MySQL - JDBC Connectivity

Similar Messages

Maybe you are looking for