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    Hi, i'm juhyuk kim. i am using node.js and java.
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    See AllLectureDBError블록체인(BlockChain)System/NetworkJava & Spring BootBookEtc.Js/TsAWSNode.jsDockerKubernetesSecurityJava & JPA & HibernateRedisAI
    Spring Cloud Vault : invalid token

    Spring Cloud Vault : invalid token

    영구적인 Role Id가 생성하는 temporary token
    김주혁's avatar
    Apr 22, 2026
    Java & Spring BootSecurity
    .codex/AGENTS.md는 읽히는데 status는 왜 <none>일까

    .codex/AGENTS.md는 읽히는데 status는 왜 <none>일까

    김주혁's avatar
    Apr 08, 2026
    Etc.AI
    백업 정책의 소중함

    백업 정책의 소중함

    김주혁's avatar
    Apr 07, 2026
    DB
    메모리 누수(Leak)가 발생했을 때 시스템은 어떻게 반응할까?

    메모리 누수(Leak)가 발생했을 때 시스템은 어떻게 반응할까?

    How does a system react when a memory leak occurs?
    김주혁's avatar
    Nov 22, 2025
    System/NetworkEtc.
    Spring Boot Relaxed Binding으로 인한 Gateway Connection Refused

    Spring Boot Relaxed Binding으로 인한 Gateway Connection Refused

    Spring Boot의 환경 변수 매핑은 어떻게 돌아가는 걸까?
    김주혁's avatar
    Nov 19, 2025
    Java & Spring BootError
    Spring Cloud Vault : invalid token

    Spring Cloud Vault : invalid token

    영구적인 Role Id가 생성하는 temporary token
    김주혁's avatar
    Apr 22, 2026
    Java & Spring BootSecurity
    .codex/AGENTS.md는 읽히는데 status는 왜 <none>일까

    .codex/AGENTS.md는 읽히는데 status는 왜 <none>일까

    김주혁's avatar
    Apr 08, 2026
    Etc.AI
    백업 정책의 소중함

    백업 정책의 소중함

    김주혁's avatar
    Apr 07, 2026
    DB
    메모리 누수(Leak)가 발생했을 때 시스템은 어떻게 반응할까?

    메모리 누수(Leak)가 발생했을 때 시스템은 어떻게 반응할까?

    How does a system react when a memory leak occurs?
    김주혁's avatar
    Nov 22, 2025
    System/NetworkEtc.
    Spring Boot Relaxed Binding으로 인한 Gateway Connection Refused

    Spring Boot Relaxed Binding으로 인한 Gateway Connection Refused

    Spring Boot의 환경 변수 매핑은 어떻게 돌아가는 걸까?
    김주혁's avatar
    Nov 19, 2025
    Java & Spring BootError
    Promtail + Loki, 서버 실시간 로그 모니터링

    Promtail + Loki, 서버 실시간 로그 모니터링

    딸깍으로 서버로그를 수집해보자
    김주혁's avatar
    Nov 04, 2025
    System/NetworkJava & Spring BootDocker
    Spring Cloud Gateway에서 발생한 UnsupportedOperationException

    Spring Cloud Gateway에서 발생한 UnsupportedOperationException

    왜 null 입니까?
    김주혁's avatar
    Oct 09, 2025
    Java & Spring BootSystem/NetworkSecurity
    Docker Compose : mysql exporter no user specified in section or parent

    Docker Compose : mysql exporter no user specified in section or parent

    mysql exporter docker compose 설정문제
    김주혁's avatar
    Sep 24, 2025
    DockerDBSystem/NetworkEtc.
    Claude Code > command not found : claude

    Claude Code > command not found : claude

    클로드 코드 설치했는데 커맨드 찾을 수 없다고 할 때
    김주혁's avatar
    Jul 31, 2025
    Etc.
    고성능 JPA & Hibernate - Connection Management and Hibernate Connection Providers

    고성능 JPA & Hibernate - Connection Management and Hibernate Connection Providers

    JPA Connection 연결과 공급자
    김주혁's avatar
    Jul 11, 2025
    LectureJava & Spring BootJava & JPA & HibernateDB
    근황

    근황

    김주혁's avatar
    Jul 09, 2025
    Etc.
    고성능 JPA & Hibernate - Intergration Testing With Docker

    고성능 JPA & Hibernate - Intergration Testing With Docker

    H2 대신 tmpfs?
    김주혁's avatar
    Jul 07, 2025
    Java & Spring BootDBJava & JPA & Hibernate
    고성능 JPA & Hibernate - Logging SQL Statements

    고성능 JPA & Hibernate - Logging SQL Statements

    Hibernate Logging에 대하여...
    김주혁's avatar
    Jul 04, 2025
    Java & Spring BootJava & JPA & HibernateDBLecture
    Spring Boot - 예외(Exception) 처리에 관해서

    Spring Boot - 예외(Exception) 처리에 관해서

    Spring Boot Exception .
    김주혁's avatar
    Jun 10, 2025
    Java & Spring BootError
    Cursor없이 MCP와 Claude를 사용해 Cursor처럼 사용할 수 있다?

    Cursor없이 MCP와 Claude를 사용해 Cursor처럼 사용할 수 있다?

    Cursor없이 내 프로젝트를 AI에게 맡겨볼 수 있다면... By IntelliJ
    김주혁's avatar
    May 29, 2025
    Etc.
    Spring Boot, Redisson 분산 락(Distributed Lock)

    Spring Boot, Redisson 분산 락(Distributed Lock)

    Synchronizer Control with Spring Redisson Distributed Lock
    김주혁's avatar
    Jan 08, 2025
    DBJava & Spring BootSystem/NetworkEtc.Redis
    ANTLR Tool version … used for code generation does not match the current runtime version …

    ANTLR Tool version … used for code generation does not match the current runtime version …

    Version mismatch between Hibernate and Spring Data JPA (EX : Cannot invoke "org.antlr.v4.runtime.ParserRuleContext.getParent()" because "ctx" is null)
    김주혁's avatar
    Jan 07, 2025
    Java & JPA & HibernateErrorJava & Spring Boot
    Spring boot, JPA (3) - 1차 캐시

    Spring boot, JPA (3) - 1차 캐시

    1차 캐시와 2차 캐시 등, JPA Cache 사용법
    김주혁's avatar
    Dec 03, 2024
    DBJava & Spring BootJava & JPA & Hibernate
    Spring boot, JPA (2) - 영속성 컨텍스트(Persistence Context)

    Spring boot, JPA (2) - 영속성 컨텍스트(Persistence Context)

    JPA 영속성 컨텍스트 요약
    김주혁's avatar
    Dec 03, 2024
    DBJava & JPA & HibernateJava & Spring Boot
    Spring boot, JPA (1) - Entity Manager란?

    Spring boot, JPA (1) - Entity Manager란?

    Spring boot JPA Entity Manager
    김주혁's avatar
    Dec 03, 2024
    DBJava & Spring BootJava & JPA & Hibernate
    MySQL, 효과적인 Index 설정방법

    MySQL, 효과적인 Index 설정방법

    the concept of indexes and effective MySQL indexing strategies
    김주혁's avatar
    Nov 18, 2024
    DBSystem/Network
    MySQL, 효과적인 InnoDB 사용방법

    MySQL, 효과적인 InnoDB 사용방법

    Best Practices for InnoDB Tables
    김주혁's avatar
    Nov 18, 2024
    DBSystem/Network
    ISMS-P 란?

    ISMS-P 란?

    Information Security Management System
    김주혁's avatar
    Nov 15, 2024
    Etc.SecuritySystem/Network
    ISO 27001 이란?

    ISO 27001 이란?

    김주혁's avatar
    Nov 15, 2024
    System/NetworkEtc.Security
    SQL 드라이빙 테이블이란?

    SQL 드라이빙 테이블이란?

    쿼리 조인 및 실행 계획
    김주혁's avatar
    Nov 15, 2024
    DBSystem/NetworkEtc.
    GS(Good Software) 인증 이란?

    GS(Good Software) 인증 이란?

    김주혁's avatar
    Nov 15, 2024
    Etc.Security
    CSAP(Cloud Security Assurance Program) 이란?

    CSAP(Cloud Security Assurance Program) 이란?

    한국인터넷진흥원(KISA)에서 주관하는 클라우드 서비스 보안 인증 제도
    김주혁's avatar
    Nov 15, 2024
    SecuritySystem/NetworkEtc.
    SOC2 란?

    SOC2 란?

    System and Organization Controls
    김주혁's avatar
    Nov 15, 2024
    Etc.Security
    Java & Spring boot, Thread Safety 하지 않은 Singleton 객체(JSONParser)

    Java & Spring boot, Thread Safety 하지 않은 Singleton 객체(JSONParser)

    Spring boot에서 com.googlecode.json-simple:json-simple 라이브러리를 사용할 때 싱글톤으로 만들면 안되는 이유
    김주혁's avatar
    Nov 01, 2024
    Java & Spring BootErrorSystem/Network
    brew install vault-radar, Error: Your Command Line Tools are too outdated.

    brew install vault-radar, Error: Your Command Line Tools are too outdated.

    김주혁's avatar
    Oct 28, 2024
    ErrorSystem/NetworkEtc.
    Docker 로그 파일 관리로 해결하는 EC2 스토리지 부족 문제(logrotate)

    Docker 로그 파일 관리로 해결하는 EC2 스토리지 부족 문제(logrotate)

    Resolving EC2 Storage Shortage Issues Through Docker Log File Management (logrotate)
    김주혁's avatar
    Oct 22, 2024
    DockerSystem/NetworkErrorEtc.
    Spring boot, JPA could not initialize proxy - no Session

    Spring boot, JPA could not initialize proxy - no Session

    closing the session or not keeping the session open to fetch the LAZY loaded objects.
    김주혁's avatar
    Sep 24, 2024
    DBErrorEtc.Java & Spring BootSystem/NetworkJava & JPA & Hibernate
    AWS Kinesis - Firehose Introduce (2)

    AWS Kinesis - Firehose Introduce (2)

    Partition streaming data & Convert input data format & etc …
    김주혁's avatar
    Sep 23, 2024
    System/NetworkEtc.AWS
    AWS Kinesis - Firehose Introduce (1)

    AWS Kinesis - Firehose Introduce (1)

    Introduce & Tutorial : Stream Create & Transform source data
    김주혁's avatar
    Sep 23, 2024
    AWSSystem/NetworkEtc.
    AWS Kinesis - Kinesis Data Stream Introduce

    AWS Kinesis - Kinesis Data Stream Introduce

    Understanding Kinesis Data Stream
    김주혁's avatar
    Sep 09, 2024
    System/NetworkEtc.AWS
    Kubernetes-Masterclass | Fargate & NLB & ECR

    Kubernetes-Masterclass | Fargate & NLB & ECR

    김주혁's avatar
    Sep 09, 2024
    LectureSystem/NetworkAWSEtc.
    Pricing Comparison of ElastiCache Serverless

    Pricing Comparison of ElastiCache Serverless

    Is ElastiCache Serverless Actually More Cost-Effective When Implemented? (ElastiCache Serverless Pricing)
    김주혁's avatar
    Sep 06, 2024
    DBSystem/NetworkAWSEtc.
    Spring boot, Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'xxxxController' method

    Spring boot, Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'xxxxController' method

    RequestMapping Duplicated ERROR
    김주혁's avatar
    Aug 30, 2024
    Java & Spring BootError
    RDS SSL 인증서 만료, Caused by: java.security.cert.CertificateExpiredException : NotAfter

    RDS SSL 인증서 만료, Caused by: java.security.cert.CertificateExpiredException : NotAfter

    rds certificate expired
    김주혁's avatar
    Aug 23, 2024
    DBErrorJava & Spring BootAWS
    Spring Boot, Which one should i use @Transactional ?

    Spring Boot, Which one should i use @Transactional ?

    Which one should you use: @javax.transaction.Transactional or @org.springframework.transaction.Transactional?
    김주혁's avatar
    Aug 20, 2024
    DBJava & Spring BootJava & JPA & Hibernate
    Kubernetes-Masterclass | LBC, Ingress & Service Account(SA) & Webhook Service & Ingress Class

    Kubernetes-Masterclass | LBC, Ingress & Service Account(SA) & Webhook Service & Ingress Class

    김주혁's avatar
    Aug 20, 2024
    System/NetworkLectureAWS
    Kubernetes-Masterclass | Load Balancer & Private Node Group

    Kubernetes-Masterclass | Load Balancer & Private Node Group

    Load Balancer(ALB, CLB, NBL) & Private Node Group
    김주혁's avatar
    Aug 20, 2024
    System/NetworkAWSLecture
    MyBatis에서 AUTO INCREMENT 값 가져오기

    MyBatis에서 AUTO INCREMENT 값 가져오기

    How to Retrieve the Inserted ID in MyBatis
    김주혁's avatar
    Aug 19, 2024
    DBJava & Spring Boot
    Clean Architecture 개념과 의존성 역전 원칙(DIP)

    Clean Architecture 개념과 의존성 역전 원칙(DIP)

    How does Clean Architecture follow to the DIP (Dependency Inversion Principle) ?
    김주혁's avatar
    Aug 18, 2024
    Etc.Java & Spring BootSystem/Network
    Kubernetes-Masterclass | Application Deploy Concept & AWS RDS

    Kubernetes-Masterclass | Application Deploy Concept & AWS RDS

    application deploy 개념과 aws rds 사용
    김주혁's avatar
    Aug 11, 2024
    LectureDBSystem/NetworkAWS
    Kubernetes-Masterclass | YAML , EBS

    Kubernetes-Masterclass | YAML , EBS

    YAML & EBS
    김주혁's avatar
    Aug 05, 2024
    System/NetworkAWSLecture
    JAVA, Error : java.lang.StackOverflowError

    JAVA, Error : java.lang.StackOverflowError

    재귀호출로 발생하는 무한루프
    김주혁's avatar
    Aug 05, 2024
    Java & Spring BootErrorSystem/Network
    Kubernetes-Masterclass | Kubernetes, Pod, ReplicaSet, Deployment

    Kubernetes-Masterclass | Kubernetes, Pod, ReplicaSet, Deployment

    EKS Master Class Week 1
    김주혁's avatar
    Jul 29, 2024
    System/NetworkAWSLecture
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