JavaServlets-Runnable（scheduled）函数在AWS中执行两次_Java_Amazon Web Services_Servlets_Amazon Ec2_Tomcat9

JavaServlets-Runnable（scheduled）函数在AWS中执行两次

java amazon-web-services servlets amazon-ec2

JavaServlets-Runnable（scheduled）函数在AWS中执行两次,java,amazon-web-services,servlets,amazon-ec2,tomcat9,Java,Amazon Web Services,Servlets,Amazon Ec2,Tomcat9,我在JavaServletWebApp中设置了一个每天运行的计划任务，但问题是它每天运行两次。此问题仅在部署到AWS EC2时发生，当我通过Eclipse在计算机上本地运行相同的代码时，它只执行一次计划任务（如预期的）还有一部分我不明白，自从我实现了下面的类之后，我必须在AWS上启动两次Tomcat，webapp才能在线并通过web访问。如果我只运行一次Tomcat，webapp将不会联机，并且在输入网站URL时，我的浏览器会出现“未找到网页”错误我在这里搜索了有关堆栈溢出的类似问题，但没有

我在JavaServletWebApp中设置了一个每天运行的计划任务，但问题是它每天运行两次。此问题仅在部署到AWS EC2时发生，当我通过Eclipse在计算机上本地运行相同的代码时，它只执行一次计划任务（如预期的）

还有一部分我不明白，自从我实现了下面的类之后，我必须在AWS上启动两次Tomcat，webapp才能在线并通过web访问。如果我只运行一次Tomcat，webapp将不会联机，并且在输入网站URL时，我的浏览器会出现“未找到网页”错误

我在这里搜索了有关堆栈溢出的类似问题，但没有找到有关导致此问题的原因的更多信息

为什么下面的代码在AWSEC2上运行两次，而在我的本地计算机上通过Eclipse只运行一次？如何在AWS上解决此问题

ScheduleManager类：

package com.schedule;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

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

import com.schedule.task.NonSubmittedTimesheetNotificationSchedule;

@WebListener
public class ScheduleManager implements ServletContextListener
{
    private ScheduledExecutorService scheduler;

    @Override
    public void contextInitialized(ServletContextEvent event)
    {
        scheduler = Executors.newSingleThreadScheduledExecutor();
        scheduler.scheduleAtFixedRate(new NonSubmittedTimesheetNotificationSchedule(event.getServletContext()), 0, 7*24*60*60, TimeUnit.SECONDS);
    }

    @Override
    public void contextDestroyed(ServletContextEvent event)
    {
        scheduler.shutdownNow();
    }
}

package com.schedule.task;

import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;

import com.process.EmailModule;

public class NonSubmittedTimesheetNotificationSchedule implements Runnable
{
    private ServletContext context;

    public NonSubmittedTimesheetNotificationSchedule(ServletContext context)
    {
        this.context = context;
    }

    @Override
    public void run()
    {
        EmailModule.sendEmailToManagers();
        EmailModule.sendEmailToUsers();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
  <display-name>MyApp</display-name>
  <welcome-file-list>
    <welcome-file>login.html</welcome-file>
  </welcome-file-list>
  <session-config>
    <session-timeout>120</session-timeout>
  </session-config>
  <listener>
    <listener-class>com.session.ActiveSessionListener</listener-class>
  </listener>
  <filter>
    <filter-name>AuthenticationFilter</filter-name>
    <filter-class>com.filter.AuthenticationFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>AuthenticationFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>CredentialsFilter</filter-name>
    <filter-class>com.filter.CredentialsFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CredentialsFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <error-page>
    <error-code>404</error-code>
    <location>/error.html</location>
  </error-page>
  <context-param>
    <param-name>username</param-name>
    <param-value>admin</param-value>
  </context-param>
  <context-param>
    <param-name>password</param-name>
    <param-value>admin</param-value>
  </context-param>
</web-app>

未提交的时间表通知类：

package com.schedule;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

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

import com.schedule.task.NonSubmittedTimesheetNotificationSchedule;

@WebListener
public class ScheduleManager implements ServletContextListener
{
    private ScheduledExecutorService scheduler;

    @Override
    public void contextInitialized(ServletContextEvent event)
    {
        scheduler = Executors.newSingleThreadScheduledExecutor();
        scheduler.scheduleAtFixedRate(new NonSubmittedTimesheetNotificationSchedule(event.getServletContext()), 0, 7*24*60*60, TimeUnit.SECONDS);
    }

    @Override
    public void contextDestroyed(ServletContextEvent event)
    {
        scheduler.shutdownNow();
    }
}

package com.schedule.task;

import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;

import com.process.EmailModule;

public class NonSubmittedTimesheetNotificationSchedule implements Runnable
{
    private ServletContext context;

    public NonSubmittedTimesheetNotificationSchedule(ServletContext context)
    {
        this.context = context;
    }

    @Override
    public void run()
    {
        EmailModule.sendEmailToManagers();
        EmailModule.sendEmailToUsers();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
  <display-name>MyApp</display-name>
  <welcome-file-list>
    <welcome-file>login.html</welcome-file>
  </welcome-file-list>
  <session-config>
    <session-timeout>120</session-timeout>
  </session-config>
  <listener>
    <listener-class>com.session.ActiveSessionListener</listener-class>
  </listener>
  <filter>
    <filter-name>AuthenticationFilter</filter-name>
    <filter-class>com.filter.AuthenticationFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>AuthenticationFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>CredentialsFilter</filter-name>
    <filter-class>com.filter.CredentialsFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CredentialsFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <error-page>
    <error-code>404</error-code>
    <location>/error.html</location>
  </error-page>
  <context-param>
    <param-name>username</param-name>
    <param-value>admin</param-value>
  </context-param>
  <context-param>
    <param-name>password</param-name>
    <param-value>admin</param-value>
  </context-param>
</web-app>

web.xml文件：

package com.schedule;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

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

import com.schedule.task.NonSubmittedTimesheetNotificationSchedule;

@WebListener
public class ScheduleManager implements ServletContextListener
{
    private ScheduledExecutorService scheduler;

    @Override
    public void contextInitialized(ServletContextEvent event)
    {
        scheduler = Executors.newSingleThreadScheduledExecutor();
        scheduler.scheduleAtFixedRate(new NonSubmittedTimesheetNotificationSchedule(event.getServletContext()), 0, 7*24*60*60, TimeUnit.SECONDS);
    }

    @Override
    public void contextDestroyed(ServletContextEvent event)
    {
        scheduler.shutdownNow();
    }
}

package com.schedule.task;

import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;

import com.process.EmailModule;

public class NonSubmittedTimesheetNotificationSchedule implements Runnable
{
    private ServletContext context;

    public NonSubmittedTimesheetNotificationSchedule(ServletContext context)
    {
        this.context = context;
    }

    @Override
    public void run()
    {
        EmailModule.sendEmailToManagers();
        EmailModule.sendEmailToUsers();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
  <display-name>MyApp</display-name>
  <welcome-file-list>
    <welcome-file>login.html</welcome-file>
  </welcome-file-list>
  <session-config>
    <session-timeout>120</session-timeout>
  </session-config>
  <listener>
    <listener-class>com.session.ActiveSessionListener</listener-class>
  </listener>
  <filter>
    <filter-name>AuthenticationFilter</filter-name>
    <filter-class>com.filter.AuthenticationFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>AuthenticationFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>CredentialsFilter</filter-name>
    <filter-class>com.filter.CredentialsFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CredentialsFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <error-page>
    <error-code>404</error-code>
    <location>/error.html</location>
  </error-page>
  <context-param>
    <param-name>username</param-name>
    <param-value>admin</param-value>
  </context-param>
  <context-param>
    <param-name>password</param-name>
    <param-value>admin</param-value>
  </context-param>
</web-app>


MyApp
login.html
120
com.session.ActiveSessionListener
身份验证过滤器
com.filter.AuthenticationFilter
身份验证过滤器
/*
证书过滤器
com.filter.CredentialsFilter
证书过滤器
/*
404
/error.html
用户名
管理
密码
管理

我认为您不应该将

@WebListener

与

web.xml

混合使用我认为您不应该将

@WebListener

与

web.xml