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Java - 死锁 Dead Lock 定位分析

發(fā)布時間：2025/3/21 java 24 豆豆

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文章目錄

Pre
jstack
Thread dump
Dead Lock 分析
分析代碼
解決

Pre

JVM-11虛擬機性能監(jiān)控與故障處理工具之【JDK的可視化工具-JConsole】

jstack

jstack主要用來查看某個Java進程內的線程堆棧信息，建議多殺幾次線程dump ,每次都有某個事件，基本沒跑了~

用法也很簡單

Thread dump

Found one Java-level deadlock: ============================= "T-ShortConn-4":waiting to lock monitor 0x00007f87e1d95718 (object 0x00000006cc86c090, a java.lang.Class),which is held by "T-ShortConn-0" "T-ShortConn-0":waiting to lock monitor 0x00007f875c00f188 (object 0x00000006c6f34238, a java.util.concurrent.ConcurrentHashMap),which is held by "localhost-startStop-1" "localhost-startStop-1":waiting to lock monitor 0x00007f87e1d95718 (object 0x00000006cc86c090, a java.lang.Class),which is held by "T-ShortConn-0"Java stack information for the threads listed above: =================================================== "T-ShortConn-4":at com.artisan.bus.tool.redis.RedisClusterHelper.getClient(RedisClusterHelper.java:38)- waiting to lock <0x00000006cc86c090> (a java.lang.Class for com.artisan.bus.tool.redis.RedisClusterHelper)at com.artisan.bus.tool.redis.RedisClusterHelper.listOs(RedisClusterHelper.java:328)at com.artisan.bus.tool.redis.RedisClusterHelper.lSize(RedisClusterHelper.java:193)at com.artisan.bus.service.comunication.CommunicationService.send(CommunicationService.java:1922)at com.artisan.bus.service.comunication.CommunicationService$$FastClassBySpringCGLIB$$cacacc60.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)at com.artisan.bus.service.comunication.CommunicationService$$EnhancerBySpringCGLIB$$8902c097.send(<generated>)at net.artisan.manager.DataProcessorManager.send(DataProcessorManager.java:850)at net.artisan.manager.DataProcessorManager.processShortLinkData(DataProcessorManager.java:833)at net.artisan.common.ShortLinkProcessorThread.run(ShortLinkProcessorThread.java:22)at java.lang.Thread.run(Thread.java:748) "T-ShortConn-0":at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:187)- waiting to lock <0x00000006c6f34238> (a java.util.concurrent.ConcurrentHashMap)at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:486)at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:432)at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:403)at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:389)at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1002)at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:345)at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:340)at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1093)at com.artisan.bus.tool.utils.SpringApplicationContext.getBean(SpringApplicationContext.java:31)at com.artisan.bus.tool.redis.RedisClusterHelper.getClient(RedisClusterHelper.java:40)- locked <0x00000006cc86c090> (a java.lang.Class for com.artisan.bus.tool.redis.RedisClusterHelper)at com.artisan.bus.tool.redis.RedisClusterHelper.listOs(RedisClusterHelper.java:328)at com.artisan.bus.tool.redis.RedisClusterHelper.lSize(RedisClusterHelper.java:193)at com.artisan.bus.service.comunication.CommunicationService.send(CommunicationService.java:1922)at com.artisan.bus.service.comunication.CommunicationService$$FastClassBySpringCGLIB$$cacacc60.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)at com.artisan.bus.service.comunication.CommunicationService$$EnhancerBySpringCGLIB$$8902c097.send(<generated>)at net.artisan.manager.DataProcessorManager.send(DataProcessorManager.java:850)at net.artisan.manager.DataProcessorManager.processShortLinkData(DataProcessorManager.java:833)at net.artisan.common.ShortLinkProcessorThread.run(ShortLinkProcessorThread.java:22)at java.lang.Thread.run(Thread.java:748) "localhost-startStop-1":at com.artisan.bus.tool.redis.RedisClusterHelper.getClient(RedisClusterHelper.java:38)- waiting to lock <0x00000006cc86c090> (a java.lang.Class for com.artisan.bus.tool.redis.RedisClusterHelper)at com.artisan.bus.tool.redis.RedisClusterHelper.del(RedisClusterHelper.java:63)at com.artisan.bus.dao.impl.settings.template.strategy.StrategyTemplateDao.cacheStrategyTemplate(StrategyTemplateDao.java:173)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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)at com.sun.proxy.$Proxy82.cacheStrategyTemplate(Unknown Source)at com.artisan.bus.service.impl.task.CheckTaskService.cacheStrategyTemplate(CheckTaskService.java:3658)at com.artisan.bus.service.impl.task.CheckTaskService$$FastClassBySpringCGLIB$$b794226f.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)at com.artisan.bus.service.impl.task.CheckTaskService$$EnhancerBySpringCGLIB$$7b018424.cacheStrategyTemplate(<generated>)at com.artisan.bus.web.filter.ApplicationConfigue.setApplicationContext(ApplicationConfigue.java:74)at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:121)at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:97)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)- locked <0x00000006c6f34238> (a java.util.concurrent.ConcurrentHashMap)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)- locked <0x00000006c6f655a8> (a java.lang.Object)at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:138)at javax.servlet.GenericServlet.init(GenericServlet.java:158)at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1269)- locked <0x00000006c6d54a78> (a org.apache.catalina.core.StandardWrapper)at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1182)- locked <0x00000006c6d54a78> (a org.apache.catalina.core.StandardWrapper)at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1072)- locked <0x00000006c6d54a78> (a org.apache.catalina.core.StandardWrapper)at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5368)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5660)- locked <0x00000006c54f5f78> (a org.apache.catalina.core.StandardContext)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)- locked <0x00000006c54f5f78> (a org.apache.catalina.core.StandardContext)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1260)at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:2002)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)Found 1 deadlock.

Dead Lock 分析

jstack 殺出來的線程堆棧，劃重點~~~

三個線程 T-ShortConn-4 、 T-ShortConn-0 和 localhost-startStop-1

看括號里面的 object xxxxxxx

T-ShortConn-4 想去獲取lock 【object 0x00000006cc86c090】 , 但這個lock被 T-ShortConn-0持有
T-ShortConn-0 想去獲取lock 【object 0x00000006c6f34238】 , 但這個lock被 localhost-startStop-1持有
localhost-startStop-1 想去獲取lock 【object 0x00000006cc86c090】 , 但這個lock被 T-ShortConn-0持有

====》得出結論

T-ShortConn-0 持有的lock 【0x00000006cc86c090】被 T-ShortConn-4 和 localhost-startStop-1 需要
localhost-startStop-1 持有的lock 【0x00000006c6f34238】被 T-ShortConn-0 需要

這不就產(chǎn)生deal lock了么？

分析代碼

T-ShortConn-0 持有的lock 【0x00000006cc86c090】那就去dump中查找這個關鍵字吧

at com.artisan.bus.tool.utils.SpringApplicationContext.getBean(SpringApplicationContext.java:31)at com.artisan.bus.tool.redis.RedisClusterHelper.getClient(RedisClusterHelper.java:40)- locked <0x00000006cc86c090> (a java.lang.Class for com.artisan.bus.tool.redis.RedisClusterHelper)

localhost-startStop-1 持有的lock 【0x00000006c6f34238】

DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:187) 返回的是一個 ConcurrentHashMap ， lock類型就是 ConcurrentHashMap。

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)- locked <0x00000006c6f34238> (a java.util.concurrent.ConcurrentHashMap)

解決

解決方法：提前初始化RedisClusterHelper這個單例

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