Freaks City

Install Docker following the official documentation for you're operating system. Docker Compose Setup Install Docker Compose according to the offciial installation guide. Service Configuration # docker-compose.yml configuration version: "3.8" services: kafka-manager: image: knowstreaming/knowstreaming-manager:latest co ...

Message Queue Fundamentals Understanding Message Queues A message represents data transmitted between applications. Messages can range from simple text strings to complex structures containing embedded objects. A Message Queue (MQ) serves as an asynchronous communication mechanism in software systems. It decouples communication between differen ...

Problem Description When running Kafka consumers in production, you may encounter the following error patterns: Client-side logs: The provided member is not known in the current generation i/o timeout Server-side logs (broker): [GroupCoordinator 0]: Sending empty assignment to member watermill-xxx of group-name for generation 14 with no errors ...

Content Moderation Workflow In content-driven applications, ensuring the safety and compliance of user-generated content is critical before publication. The automated moderation pipeline involves several stages triggered when a self-media user submits an article for review. Event Trigger: Upon submission, a message is dispatched to Kafka to ...

A colleague from another team reported that during project releases or restarts (using kill -15), C-end business services often experienced issues leading to financial loss. After hearing about potential money loss, I immediately took responsibility, gathered details, and started investigating. Problem Analysis Based on the descriptoin and my k ...

Dedicated Service User Creation Creating a dedicated Kafka runtime user isolates the service from your primary system account to avoid permission conflicts and environment pollusion. This step is optional but strongly recommended for production and test environments. # Create dedicated kafka service user, you will be prompted to set a password ...

Environment Setup JDK Installation yum install -y java-1.8.0 ZooKeeper Cluster Configuration Downloading ZooKeeper wget https://archive.apache.org/dist/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz tar xf apache-zookeeper-3.7.0-bin.tar.gz Configurasion File Adjustments # Backup sample configuration # cp zoo_sample.cfg zoo.cfg c ...

Architecture OverviewKafka's internal codebase is organized into distinct modules, each handling specific responsibilities. The server-side code implements the Broker's core mechanics, encompassing log persistence, controller logic, coordinator management, metadata state machines, delayed operations, consumer group oversight, and high-concurren ...

Data as the Cornerstone of Modern Recommender Engines At the heart of every effective recommendation system lies a deep understanding of user behavior. Rather than relying on static assumptions, modern systems derive user preferences from observed interactions—clicks, views, likes, purchases, and more. These behavioral signals form the foundati ...

Installation Download and extract Kafka: wget --no-check-certificate https://dlcdn.apache.org/kafka/3.0.0/kafka_2.13-3.0.0.tgz tar -xzf kafka_2.13-3.0.0.tgz cd kafka_2.13-3.0.0 Start Zookeeper and Kafka server: bin/zookeeper-server-start.sh config/zookeeper.properties bin/kafka-server-start.sh config/server.properties By default, Zookeeper li ...