问题 If you see that the storm process is getting crashed even though you have enough memory (swap/free) available then you should also check the “/proc/sys/vm/overcommit_memory” This switch knows 3 different settings: => 0: The Linux kernel is free to over commit memory(this is the default), a heuristic algorithm is applied to figure out if enough memory is available. => 1: The Linux kernel will always over commit memory,

0、持续学习者 Talk is cheap. Show me the code. 英语比编程简单。 学习和实践要平衡。 学会和时间做朋友。 学会投资，学会理财。 学会先做减法，再做加法。 学英语很重要，学

执行命令 rm -rf ~/.zcompdump*

ArrayList LinkedList HashMap LinkedHashMap TreeMap ThreadLocal ThreadPoolExecutor CopyOnWriteArrayList ConcurrentHashMap ConcurrentSkipListMap ArrayBlockingQueue LinkedBlockingQueue PriorityQueue AtomicInteger AQS (AbstractQueuedSynchronizer) CountDownLatch Semaphore CyclicBarrier ReentrantLock ReentrantReadWriteLock

搭建 rocketmq 源码调试环境 netty 设计 broker 注册 namesvr producer 发送消息 broker 存储消息 consumer 消费消息 broker 获取消息 producer 发送延时消息 producer 发送事务消息 broker 主从同步 proxy 计算存储分离 静态 topic admin 查找消息

大纲: spring cache 原理 spring mvc 请求流程 spring boot 启动流程 适配多种 servlet 容器 spring 常用扩展点 spring bean 初始化 spring websocket 原理 spring security 原理