leftso 2383 0 2020-11-20 15:31:58

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环境信息

  • dubbo 2.6.5

  • spring-boot-starter-quartz 2.0.6.RELEASE

  • spring boot 2.0.6.RELEASE

NPE错误信息

org.quartz.SchedulerException: Job instantiation failed
    at org.springframework.scheduling.quartz.AdaptableJobFactory.newJob(AdaptableJobFactory.java:47) ~[spring-context-support-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.quartz.core.JobRunShell.initialize(JobRunShell.java:127) ~[quartz-2.3.0.jar:na]
    at org.quartz.core.QuartzSchedulerThread.run(QuartzSchedulerThread.java:392) [quartz-2.3.0.jar:na]
Caused by: java.lang.NullPointerException: null
    at com.alibaba.dubbo.config.spring.beans.factory.annotation.DubboConfigBindingBeanPostProcessor.postProcessBeforeInitialization(DubboConfigBindingBeanPostProcessor.java:79) ~[dubbo-2.6.5.jar:2.6.5]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1686) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:407) ~[spring-beans-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    at org.springframework.boot.autoconfigure.quartz.AutowireCapableBeanJobFactory.createJobInstance(AutowireCapableBeanJobFactory.java:45) ~[spring-boot-autoconfigure-2.0.6.RELEASE.jar:2.0.6.RELEASE]
    at org.springframework.scheduling.quartz.AdaptableJobFactory.newJob(AdaptableJobFactory.java:43) ~[spring-context-support-5.0.10.RELEASE.jar:5.0.10.RELEASE]
    ... 2 common frames omitted
​

 

NullPointerException 原因分析

spring-boot-autoconfigure-2.0.2.RELEASE.jar->AutowireCapableBeanJobFactory.java

    protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
        Object jobInstance = super.createJobInstance(bundle);
        this.beanFactory.autowireBean(jobInstance);
        this.beanFactory.initializeBean(jobInstance, (String)null);
        return jobInstance;
    }

注意,上面创建job实列时候,赋值的bean的name为 `null

 

dubbo-2.6.5.jar>DubboConfigBindingBeanPostProcessor.java

    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if (beanName.equals(this.beanName) && bean instanceof AbstractConfig) {
            AbstractConfig dubboConfig = (AbstractConfig)bean;
            this.bind(this.prefix, dubboConfig);
            this.customize(beanName, dubboConfig);
        }
​
        return bean;
    }

提示,dubbo在使用beanName的时候未作空验证,导致NullPointerException

 

解决办法

根据dubbo的说法升级spring boot 版本,参考https://github.com/apache/dubbo/issues/2429

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.5.RELEASE</version>
        <relativePath/> 
    </parent>

测试通过,升级到 2.1.9.RELEASE , 2.1.18.RELEASE2.3.5.RELEASE

 

application.properties 文件增加配置

spring.main.allow-bean-definition-overriding=true

提示:如果application.properties文件不添加上方配置可能在启动时候报错当dubbo版本为(2.6.9)时候,2.6.5版本不会

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