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JVM线程dump Bug描述在JAVA语言中，当同步块(Synchronized)被多个线程并发访问时，JVM中会采用基于互斥实现的重量级锁。JVM最多只允许一个线程持有这把锁，如果其它线程想要获得这把锁就必须处于等待状态，也就是说在同步块被并发访问时，最多只会有一个处于RUNNABLE状态的...

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记一次闲鱼线上问题的排查——一把无人持有的锁 1 背景近期，闲鱼核心应用出现了一个比较难解决的问题。在该应用集群中，会随机偶现一两个实例，其JVM运行在一个挂起的状态，深入分析stack文件发现，此时jvm中有大量的线程在等待一把没有任何线程持有的锁。问题实例所在的机器负载相对正常机器要轻很多，而...

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更新时间 2023-01-13 23:49:11

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