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1, Introduction to ZooKeeper ZooKeeper Description: it is a distributed, open source distributed application coordination service ZooKeeper's goal is to encapsulate complex and error prone key services and provide users with simple and easy-to-use interfaces and systems with efficient performance and stable functions. ZooKeeper features: 1. ...

Business logic analysis of election core method lookForLeader() After knowing the role of important classes and member variables related to the election, let's start to analyze the method lookForLeader(), which actually executes the election logic: 1) Preparations for the election 2) Throw yourself as the initial leader 3) Loop exchange vo ...

Zookeeper zookeeper action effect: Middleware provides coordination services, assists in computing, assists in managing storage and other functionsActing on the distributed system and giving full play to its advantages, it can serve big dataSupport java and provide client Api of java and c language characteristic: Consistency: data consist ...

preface This article mainly introduces you to configuration management and service isolation in Nacos multi environment from the following points What is the Namespace of Nacos Business status and pain points Introduction to environmental isolation scheme Configure synchronization management scheme What is the Namespace of Nacos Nacos is a p ...

01. Get to know ZooKeeper ZooKeeper is a sub project under the Apache Hadoop project. It is a tree directory service. ZooKeeper is translated as the zoo keeper, who is used to manage Hadoop (elephant) and hive (bee). ZooKeeper is a distributed, open source coordination service for distributed applications. The main functions provided by Zo ...

1.Dubbo official website Dubbo official website home page 2. Click the document to have an in-depth understanding of dubbo; 3. Introduction to Dubbo 4. Dubbo architecture 5.Dubbo quick start 5.1 installation of zookeeper Zookeeper is a registered software officially provided by Dubbo (1) JDK installation 1) Before installing Zookeeper, you n ...

Modification version required: 1. Start two servers to automatically register IP and port information with Zookeeper 2. When the client starts, it obtains the node information of all service providers from Zookeeper, and the client establishes a connection with each server 3. After a server goes offline, the Zookeeper registration list will ...

preface In distributed systems, registry plays an important role and is an indispensable member of service discovery and client load balancing. In addition to the basic functions of the registry, its stability, availability and robustness have a significant impact on the smooth operation of the whole distributed system. As a mainstream distrib ...

[premise] The content described in this article is based on Dubbo version 2.7.3 [text] As shown above, in the previous article com. alibaba. There is a memory leak in fastjson In this article, we explained that there is a memory leak in threadLocals of threads. Look closely at the figure above. There is another place where 662.19KB of memor ...

1, run method of QuorumPeer Above Just preparing for the Leader election, but it hasn't triggered the election process. In the start method, after calling startLeaderElection(), the QuorumPeer thread will start. Next we'll start with his run method. public void run() { try { while (running) { switch (ge ...