今天对线程池的线程数量做了调整，本地测试正常，但是发布到线上是就报错了，项目也启动不了，很上火。

关键告警日志

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.ThreadPoolExecutor]: Factory method 'threadPoolExecutor' threw exception; nested exception is java.lang.IllegalArgumentException

回想了一下这次变更的内容，主要是增加了线程池的核心线程数，肯定和这个参数调整有关。

当时变更前后线程池参数

因为我们是IO密集型的服务，所以线程数比核数大。

# 变更前线程池配置
threadpool:
  corePoolSize: 30
  maximumPoolSize: 40
  workQueueSize: 200

# 变更后线程池配置
threadpool:
  corePoolSize: 50   # 只增加了核心线程数
  maximumPoolSize: 40
  workQueueSize: 200

源码

我们使用的线程池的构造器下面的，通过源码的注释可以看到抛出IllegalArgumentException的可能的几种原因，我们正好满足了maximumPoolSize < corePoolSize这种情况；原来是调整参数的时候没注意，只改了核心线程数，忘了改最大线程数导致了启动不了。

img

线上启动失败的日志详情

[2021-12-14 15:10:12,250] [ERROR] [] [858] o.s.b.SpringApplication - Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'testController': Unsatisfied dependency expressed through field 'deliveryOrderJob'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deliveryOrderJob': Unsatisfied dependency expressed through field 'threadPoolExecutor'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'threadPoolExecutor' defined in class path resource [com/XXXXX/delivery/order/assign/job/config/ThreadPoolConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.ThreadPoolExecutor]: Factory method 'threadPoolExecutor' threw exception; nested exception is java.lang.IllegalArgumentException
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1395)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at com.yonghui.delivery.order.assign.job.SpringbootDeliveryOrderAssignJobApplication.main(SpringbootDeliveryOrderAssignJobApplication.java:19)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deliveryOrderJob': Unsatisfied dependency expressed through field 'threadPoolExecutor'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'threadPoolExecutor' defined in class path resource [com/XXXXXXXX/delivery/order/assign/job/config/ThreadPoolConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.ThreadPoolExecutor]: Factory method 'threadPoolExecutor' threw exception; nested exception is java.lang.IllegalArgumentException
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1395)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1247)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
	... 19 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'threadPoolExecutor' defined in class path resource [com/yonghui/delivery/order/assign/job/config/ThreadPoolConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.ThreadPoolExecutor]: Factory method 'threadPoolExecutor' threw exception; nested exception is java.lang.IllegalArgumentException
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1305)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1144)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1247)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
	... 32 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.ThreadPoolExecutor]: Factory method 'threadPoolExecutor' threw exception; nested exception is java.lang.IllegalArgumentException
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622)
	... 45 common frames omitted
Caused by: java.lang.IllegalArgumentException: null
	at java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1314)
	at com.yonghui.delivery.order.assign.job.config.ThreadPoolConfig.threadPoolExecutor(ThreadPoolConfig.java:35)
	at com.yonghui.delivery.order.assign.job.config.ThreadPoolConfig$$EnhancerBySpringCGLIB$$82d642ae.CGLIB$threadPoolExecutor$0(<generated>)
	at com.yonghui.delivery.order.assign.job.config.ThreadPoolConfig$$EnhancerBySpringCGLIB$$82d642ae$$FastClassBySpringCGLIB$$21ec1597.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)
	at com.yonghui.delivery.order.assign.job.config.ThreadPoolConfig$$EnhancerBySpringCGLIB$$82d642ae.threadPoolExecutor(<generated>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	... 46 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:52706', transport: 'socket'
GitHub 加速计划 / th / ThreadPool
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A simple C++11 Thread Pool implementation
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