有个朋友跳槽去新公司，接手的第一个任务是排查一个线上死锁问题。两个接口互相调用，偶尔会出现卡死的情况，而且只在流量高峰期出现。他用jstack看了一下，发现两个线程都在等待对方释放锁，典型的死锁场景。 一、引入 有个朋友跳槽去新公司，接手的 ...

Learn about the best practices for concurrency in Java to ensure your multi-threaded applications are efficient, synchronized, and error-free. Concurrency in Java is the ability of multiple threads to ...

Java has endured radical transformations in the technology landscape and many threats to its prominence. What makes this technology so great, and what does the future hold for Java? In a world ...

AQS ( Abstract Queued Synchronizer ）是一个抽象的队列同步器，通过维护一个共享资源状态（ Volatile Int State ）来表示同步状态 和一个先进先出（ FIFO ）的线程等待队列来完成资源获取的排队工作，通过CAS完成对State值的修改。 概述 AQS ( Abstract Queued Synchronizer ）是一个 ...

大家好，我是小林。 深信服从 9 月底中旬开始，就开展线下面试了，说实话，线下面试比线上简单点。 就算你某些技术问题答不上来，只要会的题能说出自己的想法，说话也够热情，再加上面对面聊的场景，特容易给面试官留好印象，说不定就过了。比起线上 ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Note: The original 1995 white paper on Java’s 7 benefits actually said that “Java is interpreted ...

"main" #1 prio=5 os_prio=0 cpu=653.31ms elapsed=19.41s tid=0x0000799864024270 nid=0x2a172 waiting on condition [0x000079986c3fc000] java.lang.Thread.State: WAITING ...

For Java-based programs such as Maven, Jenkins, Gradle or Tomcat to run, they need to know that Java's JDK is installed. That's the purpose of the JAVA_HOME environment variable. It tells programs ...

A monthly overview of things you need to know as an architect or aspiring architect. Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with ...

Minecraft Java and Bedrock edition launched on PC in 2022, bringing the two main versions of the game to a mutual launcher. But even with the two games living happily as one, it can be a bit confusing ...