Springboot 问题： required a bean of type 'org.springframework.scheduling.TaskScheduler' that could not be found. - CanntBelieve

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Springboot 问题： required a bean of type 'org.springframework.scheduling.TaskScheduler' that could not be found.

不知道改了哪里，后面一直都是这个错误：

2021-07-23 18:53:06.383 [restartedMain] DEBUG o.s.b.diagnostics.LoggingFailureAnalysisReporter-report-37 - Application failed to start due to an exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.scheduling.TaskScheduler' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

具体是：

2021-07-23 18:53:06.383 [restartedMain] DEBUG o.s.b.diagnostics.LoggingFailureAnalysisReporter-report-37 - Application failed to start due to an exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.scheduling.TaskScheduler' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1790)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1346)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:923)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300)
    at com.montnets.spgate.JavaGateApplication.main(JavaGateApplication.java:31)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
2021-07-23 18:53:06.384 [restartedMain] ERROR o.s.b.diagnostics.LoggingFailureAnalysisReporter-report-40 - 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field taskScheduler in com.montnets.spgate.umc.SmsCmppEventHandler required a bean of type 'org.springframework.scheduling.TaskScheduler' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.springframework.scheduling.TaskScheduler' in your configuration.

Disconnected from the target VM, address: '127.0.0.1:53065', transport: 'socket'

Process finished with exit code 1

View Code

郁闷了。之前都是好好的，后面不知道改了哪里引起的。

难道注解不起作用？

我明明已经添加了相关注解了啊：

@EnableScheduling
@EnableAsync//启动异步

网上搜索半天，没有得到需要的，

有的说是加这个：

<logger name="org.springframework.scheduling">
    <level value="info" />
</logger>

有的说是：

logging:
  level:
    org:
      springframework:
        scheduling: info

结果是都不行；

大量的搜索都是无果，甚至于 stackoverflow 也是无果。

后面找到了TaskSchedulingAutoConfiguration，估计是条件不满足，把启动配置的 debug 设置为true，果然如此！

看到了原因：

TaskSchedulingAutoConfiguration matched:
- @ConditionalOnClass found required class 'org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler' (OnClassCondition)

TaskSchedulingAutoConfiguration#taskSchedulerBuilder matched:
- @ConditionalOnMissingBean (types: org.springframework.boot.task.TaskSchedulerBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

TaskSchedulingAutoConfiguration#taskScheduler:
Did not match:
- @ConditionalOnMissingBean (types: org.springframework.scheduling.annotation.SchedulingConfigurer,org.springframework.scheduling.TaskScheduler,java.util.concurrent.ScheduledExecutorService; SearchStrategy: all) found beans of type 'org.springframework.scheduling.annotation.SchedulingConfigurer' cacheRefreshTimer (OnBeanCondition)

原来是某个地方已经存在了SchedulingConfigurer bean，不过 cacheRefreshTimer 是什么意思... ？

SchedulingConfigurer 在哪里有定义吗？全局搜索，无果。

搜索依赖工程源码，找到了！原来是这货：

bean 名字正是： cacheRefreshTimer 。

那么，这样写有没有问题呢？

答案是不行，他定义了SchedulingConfigurer 但是没有同时注册TaskScheduler bean，所以导致了问题！

正确做法是 https://www.javarticles.com/2016/05/spring-configuring-taskscheduler-examples.html ：

package com.javarticles.spring;
 
import java.util.Date;
import java.util.concurrent.atomic.AtomicInteger;
 
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.IntervalTask;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
 
@Configuration
@EnableScheduling
public class SpringSchedulingConfigurerBeanExample {
 
    private AtomicInteger counter = new AtomicInteger(0);
     
    @Scheduled(fixedRate = 2000)
    public void fixedRateJob() {
        int jobId = counter.incrementAndGet();
        System.out.println("Job @ fixed rate " + new Date() + ", jobId: " + jobId);
    }
     
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
                SpringSchedulingConfigurerBeanExample.class);
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            context.close();
        }
    }
     
    @Configuration
    static class RegisterTaskSchedulerViaSchedulingConfigurer implements SchedulingConfigurer {
 
        @Override
        public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
            taskRegistrar.setTaskScheduler(poolScheduler());
             
            taskRegistrar.addFixedRateTask(new IntervalTask(
                    new Runnable() {
                        @Override
                        public void run() {
                            System.out.println("Job @ fixed rate " + new Date() + ", Thread name is " + Thread.currentThread().getName());
                        }
                    },
                    1000, 0));
        }
         
        @Bean
        public TaskScheduler poolScheduler() {
            ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
            scheduler.setThreadNamePrefix("poolScheduler");
            scheduler.setPoolSize(10);
            return scheduler;
        }
    }
}

View Code

package com.javarticles.spring;

import java.util.Date;

import java.util.concurrent.atomic.AtomicInteger;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.scheduling.TaskScheduler;

import org.springframework.scheduling.annotation.EnableScheduling;

import org.springframework.scheduling.annotation.Scheduled;

import org.springframework.scheduling.annotation.SchedulingConfigurer;

import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

import org.springframework.scheduling.config.IntervalTask;

import org.springframework.scheduling.config.ScheduledTaskRegistrar;

@Configuration

@EnableScheduling

public class SpringSchedulingConfigurerBeanExample {

private AtomicInteger counter = new AtomicInteger(0);

@Scheduled(fixedRate = 2000)

public void fixedRateJob() {

int jobId = counter.incrementAndGet();

System.out.println("Job @ fixed rate " + new Date() + ", jobId: " + jobId);

}

public static void main(String[] args) {

AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(

SpringSchedulingConfigurerBeanExample.class);

try {

Thread.sleep(5000);

} catch (InterruptedException e) {

e.printStackTrace();

} finally {

context.close();

}

@Configuration

static class RegisterTaskSchedulerViaSchedulingConfigurer implements SchedulingConfigurer {

@Override

public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {

taskRegistrar.setTaskScheduler(poolScheduler());

taskRegistrar.addFixedRateTask(new IntervalTask(

new Runnable() {

@Override

public void run() {

System.out.println("Job @ fixed rate " + new Date() + ", Thread name is " + Thread.currentThread().getName());

}

},

1000, 0));

}

@Bean

public TaskScheduler poolScheduler() {

ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();

scheduler.setThreadNamePrefix("poolScheduler");

scheduler.setPoolSize(10);

return scheduler;

}

}

posted on 2021-07-23 20:29 CanntBelieve 阅读(2621) 评论(0) 编辑收藏举报

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