发现一处dboss 初始化死锁问题,我的代码,由于initServiceContext()是另外一个thread来执行的，和spring本身的初始化线程产生死锁。
public class ServiceManager implements InitializingBean, BeanFactoryAware {
private List<Object> providers;
private BeanFactory beanFactory;
public void setProviders(List<Object> providers) {
this.providers = providers;
}
@Override
public void afterPropertiesSet() throws Exception {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
ServiceContext serviceContext = initServiceContext();
ServiceRemoting serviceRemoting = new NioServiceRemoting();
serviceRemoting.init(serviceContext);
serviceRemoting.start(8989);
}
});
thread.setName("Dboss-Service-Manager-Thread");
thread.setDaemon(true);
thread.start();
}
protected ServiceContext initServiceContext() {
DataResolverFactory dataResolverFactory = new DataResolverFactoryImpl();
ServiceRegister serviceRegister = new ServiceRegister();
for (Object provider : providers) {
String beanName = provider.toString();
serviceRegister.registe(beanName, this.beanFactory.getBean(beanName));
}
return new ServiceContextImpl(serviceRegister, dataResolverFactory);
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
}
解决办法： 把initServiceContext放在线程外面来做。
死锁原因分析，通过jstack能自动检测死锁,关键节点已经关注，简单的解释一下就是:
thread1: 获取lockA 等待lockB
AbstractBeanFactory.getBean()-->DefaultSingletonBeanRegistry.getSingleton()-->DefaultListableBeanFactory.getBeanDefinitionNames()
main: 获取lockB 等待lockA
ContextLoaderListener.contextInitialized()-->DefaultListableBeanFactory.preInstantiateSingletons()---->DefaultSingletonBeanRegistry.getSingleton()
"Dboss-Service-Manager-Thread" daemon prio=10 tid=0x00000000581ad800 nid=0x3683 waiting for monitor entry [0x0000000041a10000]
java.lang.Thread.State: BLOCKED (on object monitor)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinitionNames(DefaultListableBeanFactory.java:297)
- waiting to lock <0x00000000ef560190> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:329)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:320)
at org.springframework.beans.factory.BeanFactoryUtils.beanNamesForTypeIncludingAncestors(BeanFactoryUtils.java:187)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:861)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:818)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:735)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0x00000000ef5605b0> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
- locked <0x00000000ef5605b0> (a java.util.concurrent.ConcurrentHashMap)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
