'java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z

I am trying to connect my Servlet to mysql database using data Source . But whenever I run my servlet I end up getting this exception :

java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z
    org.apache.tomcat.dbcp.dbcp2.DelegatingConnection.isValid(DelegatingConnection.java:913)
    org.apache.tomcat.dbcp.dbcp2.PoolableConnection.validate(PoolableConnection.java:282)
    org.apache.tomcat.dbcp.dbcp2.PoolableConnectionFactory.validateConnection(PoolableConnectionFactory.java:356)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:2306)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2289)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2038)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1532)
    Servlet.AbdulTayyebs.processRequest(AbdulTayyebs.java:36)
    Servlet.AbdulTayyebs.doGet(AbdulTayyebs.java:57)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Here is my Content.xml

<Resource name="jdbc/abdultayyebs" auth="Container"
          type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://127.0.0.1:4000/abdultayyebs?zeroDateTimeBehavior=convertToNull"
          username="root" password="february1996" maxActive="5" maxIdle="2"
          maxWait="1000"/>

Here is my web.xml

  <resource-ref>
  <description>DB Connection</description>
  <res-ref-name>jdbc/abdultayyebs</res-ref-name>
  <res-type>javax.sql.DataSource</res-type>
  <res-auth>Container</res-auth></resource-ref>

And here is my servlet AbdulTayyebs 

 import java.io.IOException;
 import java.io.PrintWriter; 
 import java.sql.Connection;
 import java.sql.SQLException;
 import javax.naming.Context;
 import javax.naming.InitialContext;
 import javax.servlet.ServletConfig;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.sql.DataSource;

 public class AbdulTayyebs extends HttpServlet {

  DataSource ds=null;  

 @Override
 public void init(ServletConfig config)throws ServletException{
    try {
     Context initContext = new InitialContext();
     Context envContext  = (Context)initContext.lookup("java:/comp/env");
     ds = (DataSource)envContext.lookup("jdbc/abdultayyebs");  
    } catch (Exception e) {
     throw new ServletException("Something went wrong while Initializing the Servlet",e);
    }
  }

    protected void processRequest(HttpServletRequest request,                   
       HttpServletResponse response)
       throws ServletException,IOException {
       PrintWriter write = response.getWriter();
       try {   
       Others.Action a = Others.ActionFactory.CreateAction(request);
     try(Connection c=ds.getConnection()){
     String page = a.Execute(c,request,request.getSession(false));
       request.getRequestDispatcher(page).forward(request, response); 
      }      
   }     
   catch (SQLException e) {
     write.println(e);
   }
   catch (ServletException e) {
     write.println(e);     
   }
   catch (Exception e) {       
    write.println(e);
   }   
 }

 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse  response)
        throws ServletException, IOException {
      processRequest(request, response);
   }

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
     processRequest(request, response);
     } 
   }

I also added the mysql jdbc driver in the lib folder of tomcat but even this didnt helped ? It would be highly appreciable if anybody can help me out

javamysqlservletsjdbcdatasource


Solution 1:[1]

java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z

This means that the MySQL JDBC driver is outdated as such that it doesn't support Java 1.6's Connection#isValid() method.

Upgrade it. And make sure that you've only one MySQL JDBC driver JAR file in the runtime classpath.

See also:

Solution 2:[2]

For me, the solution was not to upgrade my driver (JT400). Even the latest version (9.1) appears to not have implemented isValid() (it's commented out in the code?).

What worked for me was to provide a validationQuery to my database connection pool. E.g.:

validationQuery=SELECT current date FROM sysibm.sysdummy1

Solution 3:[3]

net.sourceforge.jtds.jdbc.JtdsConnection doesn't implement isValid()

So you need to specify a connection-test-query to ensure that isValid() method isn't called Adding the following line to application.propertiesfile resolved the error for me.

spring.datasource.hikari.connection-test-query=SELECT 1

Solution 4:[4]

in my case, I upgraded ojdbc from verion 14 to 6. I had artifact ojdbc14, then I changed it to ojdbc6. I lost quite sometime here, as I thought 14 is a later version as 14>6. but 14 is meant for java 1.4. 6 means java6

Solution 5:[5]

I was getting the same thing using jt400 for DB2 , this worked out for me validationQuery="SELECT 1 FROM SYSIBM.SYSDUMMY1"

Solution 6:[6]

This is what I read about isValid method (source). The driver (here MySQL) tries to check if your connection is valid or not. Not sure how it works (as it doesn't allow to connect even when my MySQL instance/service is up and running). So, use the below string in your spring application.properties file

spring.datasource.hikari.connection-test-query=select 1 from dual (or any test query, - select sysdate from dual)

Solution 7:[7]

For me, I added the validationQuery parameter within the database connection pool config.

<Resource name="jdbc/abdultayyebs" auth="Container"
      type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
      url="jdbc:mysql://127.0.0.1:4000/abdultayyebs?zeroDateTimeBehavior=convertToNull"
      username="root" password="february1996" maxActive="5" maxIdle="2"
      maxWait="1000" validationQuery="SELECT 1"/>

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Community
Solution 2 KC Baltz
Solution 3 Rakesh Yadav
Solution 4 Feng Zhang
Solution 5 s2r610
Solution 6 Bhavesh Chetwani
Solution 7 Nishant Dayal

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