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document-haness/docs/clean-architecture-backend-template/tech-log-studio/result-and-failure-algebra/concept/concept-messaging-pulsar-experimental-c01.md
T
DongHyeonkaandClaude Opus 5 b2963105a8 docs(keycloak-session-store): import the session-storage lab as a new project
The keycloak project ended with four open questions that design could not
settle. A two-VM lab was built to answer them by measurement, and this is
that material: 26 experiments, 125 raw command outputs, 22 browser captures.

Follows the import procedure in README.md.

  source/     the originating repository verbatim — 78 documents, 28 SVGs,
              8 manifests, plus .source-revision recording the commit
  final/      the SSOT
    document.md   729 lines written from the 29 experiment documents, not
                  concatenated: what was predicted, what was measured, and
                  where the measurement itself was wrong
    evidence/raw    125 outputs, flattened to <experiment>__<file> because
                    the originals collided (01-baseline.txt appeared three
                    times) and the audit only globs the top level
    evidence/meta   one per raw file; command and exitCode are null and the
                    README says why rather than inventing them
    evidence/browser  22 captures
    assets/       three diagrams through techviz
    .techviz/     their VizSpecs

A separate project rather than an addition to keycloak: the B-layer answers
that project's four questions, but the A, C and D layers are about cluster
failure, SSO and operations, and one document.md should hold one subject.
The four question records there can point here through 관계.

Recorded rather than papered over: only three of the 28 diagrams were
remade. The repository forbids hand-drawn SVG and forbids titles inside the
canvas; all 28 originals carry both, so converting them is redrawing, not
reformatting. They stay in source/ and the gap is written into the document.

verify-pipeline.py passes. audit-records.py reports no issues.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-04 22:51:59 +09:00

2.5 KiB

kind, slug, title, topic, project, status, sourceRevision, rootTreeNode, evidenceCapturedOn, assets, evidence, source, module
kind slug title topic project status sourceRevision rootTreeNode evidenceCapturedOn assets evidence source module
CONCEPT messaging-pulsar-experimental-c01 알 수 없는 실패의 기본값을 모호로 둔다 result-and-failure-algebra clean-architecture-backend-template 게시 전 21234e38cdb9a926cbc92bb97a2aee2e4a7d2916 concept:messaging-pulsar-experimental-c01 2026-09-01
key file
messaging-pulsar-experimental-c01 ../../../final/evidence/rendered/messaging-pulsar-experimental-c01.svg
key file
messaging-pulsar-experimental-c01-diagram ../../../final/assets/diagrams/messaging-pulsar-experimental-c01.svg
../../../final/evidence/raw/messaging-pulsar-experimental-c01.txt
원본 분석 절은 analysis/messaging/messaging-pulsar-experimental.md#L50 이다.
messaging-pulsar-experimental

알 수 없는 실패의 기본값을 모호로 둔다

분류는 타입 있는 신호만 본다. PulsarPreSendRejection이면 REJECTED, TimeoutException이면 시간 초과, 나머지는 전부 AMBIGUOUS다. javadoc이 이전 구현과 그 결함을 적는다.

본문

javadoc 이 이전 구현과 그 결함을 적는다. 예전에는 예외의 클래스 단순 이름을 읽어서 "Timeout"이면 모호, 그 밖이면 거절로 분류했다.

"Classification used to read the exception's class simple name: "Timeout" meant ambiguous, anything else meant rejected. A class name is not part of Pulsar's contract — it changes between client versions — and defaulting the unknown case to REJECTED tells the caller nothing was transmitted, which is how the same entry is published to the bookies twice."

기본값이 모호로 바뀐 것이 핵심이다. 알 수 없는 실패에서 안전한 방향은 모호다.

분류가 갈라지는 자리

:::evidence key="messaging-pulsar-experimental-c01-diagram" alt="사전 거절과 그 밖의 실패가 나란히 놓이고 모호가 아래에 놓인 구조" caption="분류의 기본값" zoom="false" :::

성공을 영수증이 아니라 복제 증거로 적는다

확인된 성공은 복제 증거로 기록된다 — 전송 미래가 설정된 수의 저장 노드에 기록된 뒤에야 해소되므로 영수증이 아니라 복제 증거다.

이 기록이 다루는 파일 범위

:::evidence key="messaging-pulsar-experimental-c01" alt="코드베이스에서 파일 목록을 만든 출력 8줄. 이 기록이 다루는 범위가 그 목록이다." caption="코드베이스 파일 목록 — 8줄 · exit 0" zoom="true" :::