This article evaluates popular Java web frameworks by measuring performance, ecosystem maturity, learning curve, development efficiency, enterprise adoption and innovation, providing concrete data and practical recommendations for each framework’s strengths, use‑cases and drawbacks.
The article reviews ten essential AI tools for Java developers in 2026, explaining how they automate boilerplate code, improve code quality, detect security issues, and integrate with Spring Boot, while emphasizing that AI acts as an tireless junior engineer that boosts productivity without replacing core design work.
This article walks through converting a SpringBoot Maven project (mall‑tiny) to Gradle, explains Gradle’s key features and plugins, shows step‑by‑step setup, demonstrates dependency migration, compares build times with Maven, and provides a complete Gradle build script with reference links.
This guide walks a junior developer through why logging is essential, how to configure Logback in Spring Boot, use Lombok @Slf4j, choose appropriate log levels, apply parameterized messages, control output volume, enable asynchronous logging, manage log files with rolling policies, and integrate a centralized ELK stack for distributed systems.
When a Spring @Transactional method with REQUIRES_NEW fails to persist audit logs after a rollback, the issue often stems from misconfigured rollback rules, caught exceptions, self‑invocation, non‑public or final methods, or incorrect propagation settings, all of which prevent the new transaction from committing.
This guide walks through ten practical techniques—startup lazy initialization, scoped component scanning, selective auto‑configuration, async processing, connection‑pool tuning, JPA batch settings, multi‑level caching, multi‑stage Docker builds, JVM container‑aware flags, Tomcat thread tuning, Resilience4j, observability stack, and TDD—to diagnose and eliminate performance bottlenecks in Spring Boot applications.
The article examines Maven 4’s major upgrades—including a new 4.1.0 POM model, Build POM/Consumer POM separation, explicit artifact types, subproject renaming, tree‑based lifecycle, and richer configuration expressions—while also noting the tool’s migration assistance and its impact on modern Java development.
Spring Boot packages all dependencies and an embedded web server into a single executable JAR, allowing developers to launch the application with a simple "java -jar" command without external configuration or server deployment.
This article explains how Java developers can retrieve a client’s IP address from an HttpServletRequest, handle proxy headers, and use the ip2region library (via Maven) to map the IP to its province and city, including code snippets and configuration details.
This article explains a custom OrderedTaskExecutor that uses hash‑based slot allocation and isolated queues to guarantee per‑business‑ID task ordering while preserving the high concurrency of a thread pool, illustrated with a call‑center use case and performance results.
When a Spring Boot application using @Scheduled is deployed on multiple servers, each instance triggers the same job, leading to duplicate processing; this article explains why the problem occurs, reviews simple single‑node and Redis lock approaches, and provides a step‑by‑step guide to integrate the ShedLock framework for reliable, annotation‑driven distributed locking.
The article outlines twelve concrete shifts—cloud‑native defaults, Project Loom virtual threads, selective reactive use, AI‑assisted coding, API‑first design, built‑in observability, modular monoliths, security‑by‑design, native images, confidence‑driven testing, DDD revival, and a move from code writing to system judgment—that will define Java backend engineering by 2026.
This article combines a detailed Baidu 2026 campus recruitment salary table with an extensive Java interview guide covering collections, concurrency, thread creation, thread pools, I/O models, Spring bean lifecycle, Redis persistence, MySQL isolation levels, MVCC, storage engines, data structures, TCP/UDP differences, JVM memory layout, garbage collection algorithms, and a quicksort example, providing a comprehensive resource for backend developers preparing for technical interviews.
This article explains four practical ways to determine when tasks submitted to a Java ExecutorService have finished—using Future's isDone/get, ExecutorService.invokeAll, CompletionService, and CountDownLatch—each with code examples and usage guidance.
This article reveals ten hidden Spring Boot 3 configuration tricks—from disabling the whitelabel error page and shrinking Tomcat threads to enabling HTTP/2, tuning HikariCP, caching static assets, and leveraging Actuator metrics—each illustrated with code snippets and practical steps to boost application performance.
A recent production incident revealed duplicate order IDs caused by a flawed custom Snowflake algorithm; this article reviews the standard Snowflake structure, dissects the custom implementation’s critical mistakes—short timestamp, IP‑based business ID, zeroed worker and data‑center IDs—and offers best‑practice recommendations, including using mature libraries and proper worker‑ID strategies.
Java 25, the newest LTS release, introduces a suite of language and runtime enhancements—including primitive‑type pattern matching, module‑wide imports, a lightweight main method, richer records, structured concurrency, scoped values, a vector API, and security updates—that together make Java code more concise, safer, and higher‑performing for both newcomers and seasoned developers.
This article evaluates major Java backend frameworks—Spring Boot, Quarkus, Micronaut, Vert.x, Helidon, Javalin, Dropwizard, Play Framework, Grails, Apache Wicket, Struts 2, JSF, and native Servlet+JSP—across performance, ecosystem maturity, learning curve, development efficiency, enterprise adoption, and innovation, then ranks them into five tiers from top to legacy.
This article explains how to update a Spring Boot application without stopping the old process by letting a new instance start on the same port, detailing the Tomcat internals, the required ServletContainerInitializer callbacks, and providing a complete, step‑by‑step implementation with code samples and a live test.
Maven 4 introduces a revamped POM model, native flattening, explicit artifact types, subproject support, a tree‑based lifecycle for parallel builds, and richer configuration options, making it a timely upgrade for modern Java development pipelines.
The article critically examines the promise of a universal Java data‑access API like dbVisitor, contrasts it with specialized ORM solutions such as Jimmer, and highlights the lightweight JdbcClient approach, while considering the impact of AI‑generated SQL on traditional ORM relevance.
Maven 4, now in its fifth release candidate, modernizes the 15‑year‑old Java build ecosystem with a new POM model, native Build/Consumer POM separation, explicit artifact types, subproject renaming, tree‑based lifecycle for parallel builds, and richer configuration options, while providing an official upgrade assistant.
This tutorial demonstrates how to use Jackson's JsonNode within a Spring Boot 3 environment to parse dynamic JSON, access and modify fields, convert nodes to POJOs, traverse the tree, and perform path‑based queries, providing complete code examples for each operation.
This tutorial shows how to combine the Strategy and Factory patterns in a Spring Boot payment system, separating algorithm definition, creation, and execution to achieve a flexible, extensible, and maintainable architecture that adheres to the Open/Closed principle.
This guide presents a curated list of 30 essential IntelliJ IDEA plugins, covering installation tips, productivity boosters, code quality tools, UI enhancements, and handy shortcuts, each illustrated with screenshots and brief usage notes to help Java developers work more efficiently.
The article evaluates 13 Java web frameworks across performance, ecosystem maturity, learning curve, development efficiency, enterprise adoption, and innovation, providing concrete metrics, strengths, suitable scenarios, and a tiered ranking from dominant to legacy options.
This article explains Maven 4’s release‑candidate status, its separation of Build and Consumer POMs, the upgraded 4.1.0 model with simplified syntax, tree‑shaped lifecycle, concurrent builds, and developer‑friendly features like resume and delayed deployment, helping you decide when to adopt it.
Jeandle is an open‑source LLVM‑backed JIT compiler for the JVM released by Ant Group, designed to bring LLVM’s high‑performance optimizations to Java, with a detailed roadmap, technical overview, and public GitHub repositories for developers to explore.
The article analyzes why the first OpenFeign call in micro‑service systems incurs seconds of latency, breaks down five root causes such as lazy client initialization, dynamic proxy creation, load‑balancer cold start, network handshake, and hidden dependencies, and provides concrete verification steps and four practical optimizations to move the cost to application start‑up.
Learn a practical approach to count online users in real time by leveraging Redis sorted sets (zset) with SpringBoot, covering user identification via tokens or browser fingerprinting, key Redis commands (zadd, zrangeByScore, zremrangeByScore, zrem), and scheduled cleanup logic.
This guide explains why random UUIDs are inefficient as primary keys, introduces the TSID library that creates 64‑bit time‑ordered identifiers, and provides step‑by‑step Maven setup, API usage, JPA integration, and testing examples for Spring Boot 3.5.0.
This guide explains why Maven dependency conflicts cause errors like NoSuchMethodError and ClassNotFoundException, shows step‑by‑step commands to inspect the dependency tree, and provides three practical ways—exclusions, forced versions, and dependencyManagement—to resolve and prevent such conflicts in Java projects.
The article details a step‑by‑step migration from MyBatis 3.5.0 to MyBatis‑Plus 3.1.1, explains why the conversion error for java.time.LocalDateTime appears after the switch, shows how to trace the root cause through stack traces, upgrades the mysql‑connector‑java to 5.1.37 (and later 5.1.42) to resolve the issue, and shares broader lessons about component upgrades and unexpected bugs.
This article explains how Helidon 4.2 integrates the LangChain4j framework to simplify adding large‑language‑model capabilities, covering core features, Maven setup, configuration, component creation, dependency injection, annotations, custom tools, and sample applications such as a coffee‑shop assistant.
This guide explains how to build a complete multi‑dimensional network bandwidth throttling solution in Spring Boot 3 using a custom token‑bucket algorithm, HandlerInterceptor, HttpServletResponseWrapper, and RateLimitedOutputStream to precisely control download, video streaming, and API traffic.
Maven 4 introduces a revamped POM model (4.1.0), separates build and consumer POMs to eliminate unnecessary metadata, adds explicit artifact types for classpath and module jars, renames modules to subprojects, adopts a tree‑based lifecycle for true parallel builds, and provides powerful configuration and upgrade tools, all aimed at modern Java projects.
Redis stores data in memory, so when usage reaches the maxmemory limit it triggers one of six eviction policies—noeviction, allkeys‑lru, volatile‑lru, allkeys‑random, volatile‑random, and volatile‑ttl—each suited to different scenarios, and can be set via redis.conf or CONFIG SET, as illustrated with a Java Jedis example.
This article explains how to invoke external services from a Spring Boot application using three approaches—raw HttpClient, Spring's RestTemplate, and Feign—providing code examples, configuration steps, and tips for handling headers and tokens.
When a production server suddenly hits 100% CPU, this guide shows a systematic two‑minute workflow—using top, thread inspection, hexadecimal conversion, and jstack—to quickly identify the offending process or Java thread and restore service stability.
This article introduces AgentScope Java 1.0.7, showcases its new features such as Ollama integration, Agent Skill support, and Nacos‑based A2A architecture, and walks through a complete boba‑tea‑shop example that demonstrates a Supervisor‑Worker multi‑agent system, ReActAgent configuration, dynamic MCP registration, MySQL session persistence, Mem0 long‑term memory, and AutoContextMemory compression, plus quick deployment options for local, Kubernetes, and Docker environments.
Maven 4, now in its fifth release candidate, introduces a new POM model version 4.1.0 with backward compatibility, separates build and consumer POMs to eliminate POM pollution, adds explicit artifact types for classpath and module jars, renames modules to subprojects, and brings a tree‑based lifecycle for true parallel builds, all supported by an official upgrade tool.
The article presents a low‑intrusion, highly configurable data‑audit plugin for Spring Boot that leverages MyBatis‑Plus interceptors to automatically capture before‑and‑after snapshots of INSERT, UPDATE, and DELETE operations, offering extensible logging, masking, async handling, and monitoring for enterprise systems.
This article outlines a practical roadmap for manual testers who want to become automation engineers, covering goal setting, essential programming languages, key automation tools and frameworks, test‑case design strategies, hands‑on project experience, and continuous learning habits.
This guide explains how to embed the Arthas online monitoring tool into a Spring Boot application using the Arthas Spring Boot Starter, configure telnet and HTTP ports, access the console via terminal or web, and extend debugging across multiple services with Arthas Tunnel while addressing security considerations.
Oracle’s 2026 Java roadmap highlights preview releases for value types, code reflection, AOT compilation, and structured concurrency, detailing progress on Project Loom, Valhalla, Panama, Amber, and Babylon, while noting timelines, goals, and the uncertainty of exact release dates.
Maven 4, now in its fifth release candidate, introduces a new POM model, consumer‑POM flattening, explicit artifact types, subproject renaming, a tree‑based lifecycle and richer configuration, all aimed at modernizing Java builds for modular, parallel, and cloud‑native environments.
The article shows how Spring Boot projects can replace repetitive, error‑prone Entity‑DTO‑VO conversion code with a concise MapStruct and Lombok combo, detailing setup, simple and advanced mappings, and the measurable productivity gains it brings.
Redis uses both time‑based and lazy expiration, marking keys as expired at their TTL but only removing them on the next access or during periodic cleanup, so expired keys are not deleted the instant they expire.
Faced with limitations of existing tools like Quartz, XXL-Job, and PowerJob, the author explains the motivation for creating a custom scheduling framework, describes its architecture—including gRPC communication, protobuf serialization, a self-implemented name server for load balancing, a simple message queue, and time-wheel scheduling—provides code examples, and shares diagrams of discovery and dispatch processes.
The article reveals that Kuaishou’s 2023 campus hires for backend and frontend roles typically earn 40‑50 wan yuan annually, discusses salary trends compared with previous years, and then provides a comprehensive Java backend interview guide covering JVM memory, garbage collectors, CMS GC process, concurrency primitives, and SQL join differences.
Maven 4 introduces a revamped POM model, native flattening, explicit artifact types, subproject support, a tree‑based lifecycle and richer configuration options, enabling faster, cleaner, and more predictable builds for Java projects that have evolved dramatically over the past fifteen years.
The article examines five scenarios where Spring's @Transactional annotation falls short—stock shortage, MQ messaging, batch processing, logging, and isolation/timeout settings—and demonstrates six practical techniques, including programmatic transactions, parameter tuning, transaction synchronizers, event listeners, manual transaction control, and propagation strategies, all backed by runnable demo code.
A three‑year‑old Java module riddled with technical debt was systematically refactored using AI tools, following a four‑stage plan of analysis, problem identification, solution design, and incremental implementation, while establishing rigorous verification to ensure safety and quality.
This article shows how to eliminate most try‑catch blocks in Java Spring applications by using @ControllerAdvice, custom assertion utilities, and enum‑driven error codes, providing a clean, internationalized error‑response format and even turning 404s into catchable exceptions.
Jeandle is a new open‑source JIT compiler for the JVM, built by Ant Group on LLVM, which brings LLVM’s performance and ecosystem advantages to Java, explains JIT and LLVM basics, outlines its architecture, future roadmap, and provides GitHub links for the project.
JSONPath offers a concise, XPath‑like syntax for extracting data from complex JSON structures, and this guide shows how to integrate it into Spring Boot, compare FastJSON, Jackson, and Gson implementations, and provides practical code examples, advanced configurations, and selection advice for Java projects.
The article recounts a developer’s painful experience with PageHelper, detailing how duplicate registrations, truncated result sets, and password‑update errors stem from the plugin’s ThreadLocal pagination handling, and explains the underlying code paths and safe usage practices.
This article explains the prerequisites, usage steps, and Java code for sending single SMS verification messages using Alibaba Cloud's SendSms service, including notes on batch limits and signature handling.
This article offers a systematic, high‑concurrency‑focused walkthrough of core Java design patterns—including Singleton, Factory, Strategy, Template Method, and Observer—complete with code examples, pros and cons, selection guidelines, and interview‑ready explanations to help candidates impress interviewers and secure offers.
This article explains the challenges of managing hundreds of tools for AI agents, introduces a semantic‑driven tool selection approach via the Higress AI Gateway extension for AgentScope Java, and provides performance data, code examples, and a quick‑start guide for developers.
This article explains how to create a non‑intrusive, configurable rate‑limiting component for Spring services by combining Spring AOP, a custom @RateLimit annotation, and Google Guava's RateLimiter, covering token‑bucket fundamentals, API usage, implementation details, common AOP pitfalls, and migration to distributed limiting.
Spring Boot 4.0.1 introduced a critical virtual‑thread configuration bug that disables Jetty’s virtual threads, causing massive CPU waste and slow responses; the article explains the bug’s cause, the official fix in v4.0.1, and provides upgrade steps, workarounds, and monitoring tips.
The author explains why state-owned enterprises are not always stable, why their low‑tech projects hinder interview performance, and offers concrete steps—such as adding Redis caching, multithreading, and using the STAR method—to turn a modest Java background into compelling interview material.
This article presents a complete Spring Boot 3 solution for multi‑dimensional network bandwidth throttling using a manually implemented token‑bucket algorithm, custom HandlerInterceptor, HttpServletResponseWrapper, and RateLimitedOutputStream, with detailed code samples, configuration options, and performance tuning guidance.
A recent production incident revealed duplicate order IDs caused by a flawed custom Snowflake implementation; the article reviews the standard Snowflake structure, pinpoints design mistakes such as a 31‑bit timestamp, IP‑based business IDs, and zeroed worker IDs, and offers concrete recommendations and proven library alternatives for safe distributed ID generation.
A real‑world production incident where GC pauses, thread‑pool exhaustion, and slow SQL combined to drop QPS from 3000 to 1400 and inflate response times from 200 ms to over 2 s, with detailed analysis, diagnostic criteria, and step‑by‑step optimizations that restored performance.
IntelliJ IDEA 2025.3.1 rolls back a controversial Query Console change, fixes over 200 bugs—including SQL workflow, WSL‑Gradle issues, Spring stack problems, and terminal glitches—making it a critical update for Java, Spring, and full‑stack developers seeking a more stable IDE experience.
This article walks through creating a lightweight material‑management ERP system—including login, dashboard, inventory, inbound and outbound modules—using Vue 3 for the front end and Spring Boot 3, Java 17, MySQL, and MyBatis‑Plus for the back end, highlighting the architecture and development efficiency tricks employed.
The article analyzes why Spring MVC controllers often become massive with repetitive validation, logging, and business logic, demonstrates an ugly controller example, then shows step‑by‑step refactoring using @Valid, assertion utilities, and a global exception handler to dramatically reduce code size and improve readability.
A severe production incident caused duplicate order IDs due to a flawed custom Snowflake implementation, prompting a detailed review of the standard algorithm, identification of critical design mistakes, and a set of practical recommendations for safe, scalable ID generation in distributed back‑end systems.
During a Spring‑based interview platform project, the author discovered four typical bugs introduced by Claude Code—transactional self‑invocation loss, AI‑generated NullPointerExceptions, async task failures after entity deletion, and Redis Stream message buildup—and explains the root causes and concrete remediation steps.
Jakarta NoSQL 1.0 introduces a standardized, annotation‑driven API that lets Java developers map objects to document, key‑value, column‑family, or graph databases with type‑safe CRUD and fluent queries, while supporting CDI, annotation processors, and IDE integration for higher productivity and portability.
The article shows how cluttered Spring controllers filled with try‑catch blocks, manual field checks, and business logic can be refactored into concise, readable code by using @Valid, assertion utilities, and a global exception handler, cutting the code size roughly in half.
This article reviews essential IntelliJ IDEA plugins for Java/Spring developers, detailing core features, configuration tips, and trade‑offs for each plugin, and recommends a prioritized installation order to boost productivity while monitoring performance impact.
This article explains why API data must be encrypted, compares RSA and AES, presents a hybrid RSA‑AES scheme, and walks through a complete Spring Boot implementation—including encryption utilities, request wrappers, interceptors, parameter resolvers, key management, signature validation, batch processing, caching, and best‑practice recommendations—to achieve zero‑intrusion, high‑performance API security.
This article presents a comprehensive, end‑to‑end solution for preventing duplicate consumption in RabbitMQ by combining architecture design, routing strategies, idempotent controls, state machines, and ACK mechanisms, and details six concrete implementation options with code examples.
This article explains the design and implementation of a generic asynchronous processing SDK for Java, covering its purpose, advantages, core principles, component choices, design patterns, configuration via Apollo, usage steps, safety considerations, and provides complete SQL and Spring configuration examples along with a GitHub repository link.
This guide explains how to implement precise, multi‑dimensional network bandwidth throttling in Spring Boot 3 using a manually coded token‑bucket algorithm, HandlerInterceptor, HttpServletResponseWrapper, and RateLimitedOutputStream to control download, video streaming, and API traffic.
The article critiques the hype around unified Java data‑access libraries like dbVisitor, compares them with purpose‑built ORM Jimmer, and argues that in the AI era lightweight tools such as Spring Boot's JdbcClient may replace traditional ORMs altogether.
This article analyzes seven typical reasons why Spring transactions become ineffective or fail to roll back—such as wrong method visibility, final modifiers, self‑invocation, unmanaged beans, multithreading, non‑transactional tables, mis‑configured propagation or exception handling—and provides concrete code examples and practical solutions.
This tutorial walks you through configuring Spring Boot 3.5.5 with ShardingSphere‑JDBC 5.5.2 to achieve database sharding, read‑write splitting, connection‑pool optimization using Druid, and demonstrates the complete code for entities, mappers, services, and controllers, plus verification steps.
This guide walks you through configuring JDK and Maven, installing essential VS Code extensions for Java development, setting up MySQL, creating a Spring Boot project with Maven, and running it using the Cursor IDE, including tips for troubleshooting common version and configuration errors.
IntelliJ IDEA 2025.3.1 introduced severe Maven project initialization memory leaks and WSL2 file‑system configuration resets, causing IDE freezes and OOM crashes, but JetBrains addressed these issues in the 2025.3.1.1 update and provides temporary workarounds such as cache cleanup, icon disabling, and registry tweaks.
This article explains how to design a highly available service registry for microservice architectures, covering high‑availability mechanisms, performance optimizations, scalability strategies, core registry functions, and provides a complete Java Spring Boot implementation using Redis.
This article explains how Maven‑mvnd accelerates Java project builds by using a long‑running daemon to eliminate JVM startup overhead, reduces resource consumption, improves multi‑module builds, and provides step‑by‑step installation, configuration, and usage instructions with practical command examples.
The article explains how @NotNull, @NotBlank, and @NotEmpty annotations from javax.validation differ in their constraints on primitive types, strings, collections, and maps, and shows why adding @Validated to method parameters is required for the validations to take effect.
The article shows how tangled if‑else login code caused by adding password, SMS, WeChat, and Alipay authentication can be refactored using the Strategy and Factory patterns in Spring Boot, resulting in a clean, extensible, plug‑in‑style login module that requires no changes to existing code when new methods are added.
This article shows how to let users upload a JAR that implements a predefined interface, then hot‑deploy the new implementation at runtime using either Spring annotation‑based registration or plain reflection, including bean registration, removal, and a test harness.
The article presents LeetCode problem 2609, defining a balanced substring as a consecutive segment of zeros followed by an equal number of ones, and provides a linear‑time solution using a two‑pointer scan that counts consecutive zeros and ones, with implementations in Java, C++, Python, and TypeScript, along with complexity analysis.
This article explains the TCC (Try‑Confirm‑Cancel) transaction model, its three practical variants, and provides a step‑by‑step guide with code examples for integrating Seata TCC into a Spring‑Boot e‑commerce order service, while addressing common pitfalls such as idempotency, empty rollbacks, and hanging transactions.
After upgrading IntelliJ IDEA, a Java project fails with the error ‘cannot access org.springframework.boot.SpringApplication – class file has wrong version 61.0’, which can be resolved by adjusting Maven runner settings to delegate IDE build actions to Maven and restarting the IDE.
The article explains common pitfalls that cause Spring @Transactional to fail or not roll back, such as incorrect method visibility, final or static modifiers, internal method calls, beans not managed by Spring, multithreading, unsupported database engines, misconfigured propagation, swallowed exceptions, and improper rollback settings, and offers practical solutions for each case.
The article explains why Spring Boot's RequestBody can only be read once due to servlet stream constraints, and provides a complete solution using a custom HttpServletRequestWrapper and a high‑priority filter to cache and replay the body for annotations, validation, logging and other pre‑processing steps.
The article explains how using a flow engine and plugin‑extension architecture can isolate business logic, simplify adding new services, and avoid tangled if‑else code in large backend platforms, illustrated with concrete Java examples and an open‑source project.
After upgrading to Spring Boot 4, the article explains why both Jackson 2 and Jackson 3 appear together, outlines the four major breaking changes—including package reorganization, the shift from ObjectMapper to JsonMapper, new default date serialization, and the removal of checked exceptions—and offers migration tips.
This article explains Spring's @Transactional default rollback behavior, why checked exceptions like IOException don't trigger a rollback, illustrates the resulting data inconsistency with a money‑transfer example, and shows how to fix the issue by explicitly configuring the rollbackFor attribute.
This article explains how to build short‑lived microservices using Spring Cloud Task on Spring Boot 3.5.0, covering environment setup, Maven dependencies, quick start code, configuration files, first task implementation, advanced options like custom table prefixes, external and parent task IDs, and task execution listeners with full code examples and screenshots.
A recent production incident caused duplicate order IDs due to a flawed custom Snowflake implementation, prompting a deep dive into the standard algorithm, analysis of the mistakes, and a set of best‑practice recommendations for designing robust distributed ID generators.
Netty services can accumulate CLOSE_WAIT sockets when the server fails to close its side of the socket, leading to resource exhaustion and potential service collapse; this article explains the TCP state machine, common code pitfalls, kernel tuning, defensive handlers, and a comprehensive checklist to prevent and resolve the issue.
This guide breaks down five common QPS measurement techniques—from load balancer logs and Java instrumentation to APM tools and database metrics—detailing their principles, pros and cons, real‑world pitfalls, and provides Java code examples and optimization strategies for accurate, real‑time monitoring.
