Java/Spring 기반 백엔드 엔지니어입니다. 매일 학습하고 기록하며, 동작 원리를 밑바닥부터 이해하는 것을 좋아합니다.
- 📝 매일 TIL 작성 — Java/Spring/CS 심화 학습 노트
🔀 31 PRs merged · 12 projects
openapi-generator #24047 [kotlin] Add @get:JsonValue to nested Jackson enums (#2…
openapi-generator #23982 [typescript-fetch] Fix TS2590 in instanceOf guards for …
openapi-generator #24127 [Java] Skip wildcard media types when selecting request…
openapi-generator #23971 [Java] Render object default for composed ($ref + defau…
openapi-generator #24072 [python] Run regex pattern validators in mode="before" …
openapi-generator #24081 [core] Restore sibling example for allOf with a single …
openapi-generator #24076 [core] Fix UnsupportedOperationException for oneOf memb…
openapi-generator #24017 [Java][vertx] Apply Vert.x pool defaults in buildWebCli…
openapi-generator #23872 [Java][restclient] Build XmlMapper via builder when use…
spring #1258 fix: exclude annotation types from mapper candidate com…
jackson-core #1624 Fix #1622: size base64 encoding buffer from binary leng…
jackson-core #1613 Add JsonReadFeature.ALLOW_HEXADECIMAL_NUMBERS for JSON5…
jackson-core #1614 Preserve explicit "+" sign across buffer boundaries for…
spring-boot #50734 High number of connections due to Mongo health indicator
jackson-databind #6047 Fix #6043: honor FAIL_ON_UNKNOWN_PROPERTIES for creator…
feign #3415 Return response body in FeignException from errorReadin…
feign #3382 Preserve delegate content type for multipart parameters
feign #3422 Make Expressions max length configurable (fixes #2916)
feign #3419 Honor jdk.httpclient.allowRestrictedHeaders in Http2Cli…
feign #3406 Fix feign-core test compilation broken by removed Reque…
feign #3394 Avoid ClassLoader leak from static default async execut…
feign #3407 Open observation scope and stop on non-FeignException e…
feign #3371 Forward dismiss404 from CoroutineFeign builder to Async…
feign #3370 Document metrics published by the micrometer module
resilience4j #2478 Preserve durationSupplierType when copying HedgeConfig …
spring-cloud-openfeign #1384 Fix concurrent initialization race in FeignHttpMessageC…
spring-cloud-openfeign #1378 Fix unconditional overwrite of resolved fallbackFactory…
querydsl #1791 Render object arrays as Kotlin Array in querydsl-kot…
mapstruct #4061 #4060 Report compilation error for SET_TO_DEFAULT witho…
jreleaser #2130 fix(deploy): clarify Maven Central polling log wording
spring-batch #5400 Propagate step context to worker threads in ChunkTaskEx…
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Why Driven Backend — velog
- 2026-07-01 — ThreadLocal 키가 WeakReference인데 왜 메모리가 새는가
- 2026-06-30 — Kafka는 수억 건 중 특정 offset을 어떻게 O(log n)에 찾는가 — 로그 세그먼트와 sparse index
- 2026-06-29 — 8코어에서 limits.cpu 1은 12.5ms 만에 바닥난다 — Kubernetes CFS throttling
- 2026-06-28 — commit해도 데이터 파일은 즉시 안 바뀐다 — PostgreSQL WAL과 체크포인트가 durability를 지키는 법
- 2026-06-27 — 락도 공유 변수도 없는데 왜 느려지는가 — False Sharing과 @Contended