tomcat伺服器當機解決方案

報錯資訊:

 java.lang.Object.wait(Native Method)

 java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)

 com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)

每次出現這個報錯都會導緻tomcat應用伺服器停機，加了下面的java代碼後就再也沒有停過了。

解決辦法:

編寫Java代碼

package cn.listener;

import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Enumeration;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

import com.mysql.jdbc.AbandonedConnectionCleanupThread;


@WebListener
public class ContextFinalizer implements ServletContextListener {

    public void contextInitialized(ServletContextEvent sce) {
    }

    public void contextDestroyed(ServletContextEvent sce) {
        Enumeration<Driver> drivers = DriverManager.getDrivers();
        Driver d = null;
        while (drivers.hasMoreElements()) {
            try {
                d = drivers.nextElement();
                DriverManager.deregisterDriver(d);
                System.out.println(String.format("ContextFinalizer:Driver %s deregistered", d));
            } catch (SQLException ex) {
                System.out.println(String.format("ContextFinalizer:Error deregistering driver %s", d) + ":" + ex);
            }
        }
        try {
            AbandonedConnectionCleanupThread.shutdown();
        } catch (InterruptedException e) {
            System.out.println("ContextFinalizer:SEVERE problem cleaning up: " + e.getMessage());
            e.printStackTrace();
        }
    }
}      

@WebListener，這個注解相當于在web.xml配置如下内容
      

<listener>
    <listener-class>cn.listener.ContextFinalizer</listener-class>
  </listener>      

解決方案可以參考如下網址:https://stackoverflow.com/questions/25699985/the-web-application-appears-to-have-started-a-thread-named-abandoned-connect

當然還有就是我再參考這個解決方案的時候，發現mysql-connection如果版本過低會導緻上述列出的Java代碼報錯，通過提高mysql-connection.java的版本即可解決該問題