Bean named 'defaultSockJsTaskScheduler' is expected to be of type 'org.springframework.scheduling.

超、凢脫俗 2023-06-05 05:56 1阅读 0赞

## 错误详情: ##

springboot + quartz + websocket (spring 自带得websocket 模块) 引起的冲突问题

contextLoads(com.kzcm.higo.HigoApplicationTests)  Time elapsed: 0.033 s  <<< ERROR!
    java.lang.IllegalStateException: Failed to load ApplicationContext
    Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'defaultSockJsTaskScheduler' is expected to be of type 'org.springframework.scheduling.TaskScheduler' but was actually of type 'org.springframework.beans.factory.support.NullBean'

##  环境配置: ##

springboot + quartz 定时任务 + websocket (spring 自带得websocket 模块)

## 说明: ##

集成自网上下载得一个 layui 后台管理框架,当没用把 websocket 模块加入项目中得时候,项目可以正常启动,但是加入之后就报错,一直以为是 quartz 本身得问题,把quartz得sql 表重新执行了几次还是不能启动,后来用mvn 打包才报出最上面得错误,才定位到是websocket 模块得问题,下面得报错是springboot 得报错,根本无从找起

Exception in thread "Quartz Scheduler [MySiteForMeScheduler]" org.springframework.scheduling.SchedulingException: Could not start Quartz Scheduler after delay; nested exception is org.quartz.SchedulerException: The Scheduler cannot be restarted after shutdown() has been called.
    	at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:753)
    Caused by: org.quartz.SchedulerException: The Scheduler cannot be restarted after shutdown() has been called.
    	at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:529)
    	at org.quartz.impl.StdScheduler.start(StdScheduler.java:142)
    	at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:750)

参考: [https://www.cnblogs.com/threadj/articles/10631193.html][https_www.cnblogs.com_threadj_articles_10631193.html]

参考: [https://blog.csdn.net/u013565163/article/details/80659828][https_blog.csdn.net_u013565163_article_details_80659828]

参考: [https://stackoverflow.com/questions/56169448/scheduled-task-not-working-with-websockets][https_stackoverflow.com_questions_56169448_scheduled-task-not-working-with-websockets]

## 问题定位: ##

最后全剧搜索 DefaultSockJsTaskScheduler ,通过搜索类得方式发现再

<dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-websocket</artifactId>
           <version>5.1.8.RELEASE</version>
           <scope>compile</scope>
    </dependency>

这个依赖中 org.springframework.web.socket.config.annotation.WebSocketConfigurationSupport 有一个生成定时器类的方法,最后一个方法

//
    // Source code recreated from a .class file by IntelliJ IDEA
    // (powered by Fernflower decompiler)
    //
    
    package org.springframework.web.socket.config.annotation;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.lang.Nullable;
    import org.springframework.scheduling.TaskScheduler;
    import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
    import org.springframework.util.Assert;
    import org.springframework.web.servlet.HandlerMapping;
    
    public class WebSocketConfigurationSupport {
        @Nullable
        private ServletWebSocketHandlerRegistry handlerRegistry;
        @Nullable
        private TaskScheduler scheduler;
    
        public WebSocketConfigurationSupport() {
        }
    
        @Bean
        public HandlerMapping webSocketHandlerMapping() {
            ServletWebSocketHandlerRegistry registry = this.initHandlerRegistry();
            if (registry.requiresTaskScheduler()) {
                TaskScheduler scheduler = this.defaultSockJsTaskScheduler();
                Assert.notNull(scheduler, "Expected default TaskScheduler bean");
                registry.setTaskScheduler(scheduler);
            }
    
            return registry.getHandlerMapping();
        }
    
        private ServletWebSocketHandlerRegistry initHandlerRegistry() {
            if (this.handlerRegistry == null) {
                this.handlerRegistry = new ServletWebSocketHandlerRegistry();
                this.registerWebSocketHandlers(this.handlerRegistry);
            }
    
            return this.handlerRegistry;
        }
    
        protected void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        }
    
        @Bean
        @Nullable
        public TaskScheduler defaultSockJsTaskScheduler() {
            if (this.initHandlerRegistry().requiresTaskScheduler()) {
                ThreadPoolTaskScheduler threadPoolScheduler = new ThreadPoolTaskScheduler();
                threadPoolScheduler.setThreadNamePrefix("SockJS-");
                threadPoolScheduler.setPoolSize(Runtime.getRuntime().availableProcessors());
                threadPoolScheduler.setRemoveOnCancelPolicy(true);
                this.scheduler = threadPoolScheduler;
            }
    
            return this.scheduler;
        }
    }

## 解决: ##

在 quart的配置类中手动增加 对应的 引入@Bean

@Bean
        @Nullable
        public TaskScheduler taskScheduler() {
            ThreadPoolTaskScheduler threadPoolScheduler = new ThreadPoolTaskScheduler();
                threadPoolScheduler.setThreadNamePrefix("SockJS-");
                threadPoolScheduler.setPoolSize(Runtime.getRuntime().availableProcessors());
                threadPoolScheduler.setRemoveOnCancelPolicy(true);
            return threadPoolScheduler;
        }

[https_www.cnblogs.com_threadj_articles_10631193.html]: https://www.cnblogs.com/threadj/articles/10631193.html
[https_blog.csdn.net_u013565163_article_details_80659828]: https://blog.csdn.net/u013565163/article/details/80659828
[https_stackoverflow.com_questions_56169448_scheduled-task-not-working-with-websockets]: https://stackoverflow.com/questions/56169448/scheduled-task-not-working-with-websockets

Bean named 'defaultSockJsTaskScheduler' is expected to be of type 'org.springframework.scheduling.

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