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document-haness/docs/clean-architecture-backend-template/final/evidence/rendered/a-five-second-string-that-broke-every-prod-deploy.svg
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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

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<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="1052" viewBox="0 0 1200 1052" role="img">
<title>terminal evidence</title>
<desc>Terminal-style rendering generated from retained command output. Sensitive-looking values are redacted in the visual asset.</desc>
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<text x="92" y="27" fill="#8b949e" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace">terminal evidence</text>
<text x="24" y="68" fill="#c9d1d9" font-size="15" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">$ y=app-bootstrap/src/main/resources/application.yml; v=app-bootstrap/src/main/java/dev/caskeleton/bootstrap/runtime/Hik</tspan><tspan x="24" dy="22">ariPoolConstraintValidator.java; t=app-bootstrap/src/test/java/dev/caskeleton/bootstrap/runtime/ShippedDefaultBindabilit</tspan><tspan x="24" dy="22">yTest.java; echo &#x27;# 출하 파일 안의 같은 이름, 다른 타입 — 네임스페이스와 함께&#x27;; grep -n &#x27;hikari:&#x27; $y | head -1; sed -n </tspan><tspan x="24" dy="22">&#x27;61p&#x27; $y; grep -n &#x27;^ tomcat:\|^ tomcat:&#x27; $y | head -1; sed -n &#x27;333p&#x27; $y; echo; echo &#x27;# 앞쪽이 바인딩되는 세터&#x27;; java</tspan><tspan x="24" dy="22">p -cp &quot;$(find /root/.gradle/caches/modules-2/files-2.1 -name &#x27;HikariCP-*.jar&#x27; | grep -v sources | head -1)&quot; com.zaxxer.h</tspan><tspan x="24" dy="22">ikari.HikariConfig | grep -i &#x27;ConnectionTimeout&#x27;; echo; echo &#x27;# 같은 키를 읽는 시작 검증기는 다른 규칙으로 읽는다&#x27;; grep</tspan><tspan x="24" dy="22"> -n &#x27;implements SmartInitializingSingleton&#x27; $v; grep -n &#x27;CONNECTION_TIMEOUT&#x27; $v | head -2; grep -n &#x27;DurationStyle&#x27; $v; e</tspan><tspan x="24" dy="22">cho; echo &#x27;# 지금은 정적 가드가 이 형식을 막는다&#x27;; sed -n &#x27;39,47p&#x27; $t; echo &#x27; (그 가드가 한 번 헛짚었던 자리)&#x27;; sed -n </tspan><tspan x="24" dy="22">&#x27;106,108p&#x27; $t</tspan></text>
<text x="24" y="266" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">cwd: /shared/codebase/clean-architecture-backend-template/src</tspan></text>
<text x="24" y="288" fill="#8b949e" font-size="13" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">time: 2026-09-02T01:15:50+00:00 · exit 0</tspan></text>
<line x1="24" y1="302" x2="1176" y2="302" stroke="#30363d"/>
<text x="24" y="342" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 출하 파일 안의 같은 이름, 다른 타입 — 네임스페이스와 함께</tspan></text>
<text x="24" y="364" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">37: hikari:</tspan></text>
<text x="24" y="386" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> connection-timeout: ${APP_DATASOURCE_CONNECTION_TIMEOUT:5000}</tspan></text>
<text x="24" y="408" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">322: tomcat:</tspan></text>
<text x="24" y="430" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> connection-timeout: ${APP_SERVER_TOMCAT_CONNECTION_TIMEOUT:20s}</tspan></text>
<text x="24" y="452" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="474" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 앞쪽이 바인딩되는 세터</tspan></text>
<text x="24" y="496" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> public long getConnectionTimeout();</tspan></text>
<text x="24" y="518" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> public void setConnectionTimeout(long);</tspan></text>
<text x="24" y="540" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="562" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 같은 키를 읽는 시작 검증기는 다른 규칙으로 읽는다</tspan></text>
<text x="24" y="584" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">16:public class HikariPoolConstraintValidator implements SmartInitializingSingleton {</tspan></text>
<text x="24" y="606" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">18: static final String CONNECTION_TIMEOUT_KEY = &quot;spring.datasource.hikari.connection-timeout&quot;;</tspan></text>
<text x="24" y="628" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">26: static final String CONNECTION_TIMEOUT_ENV_KEY = &quot;APP_DATASOURCE_CONNECTION_TIMEOUT&quot;;</tspan></text>
<text x="24" y="650" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">8:import org.springframework.boot.convert.DurationStyle;</tspan></text>
<text x="24" y="672" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0">125: return DurationStyle.detectAndParse(raw.trim(), ChronoUnit.MILLIS).toMillis();</tspan></text>
<text x="24" y="694" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"></tspan></text>
<text x="24" y="716" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"># 지금은 정적 가드가 이 형식을 막는다</tspan></text>
<text x="24" y="738" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> private static final List&lt;String&gt; PLAIN_MILLISECOND_KEYS =</tspan></text>
<text x="24" y="760" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> List.of(</tspan></text>
<text x="24" y="782" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.connection-timeout&quot;,</tspan></text>
<text x="24" y="804" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.validation-timeout&quot;,</tspan></text>
<text x="24" y="826" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.idle-timeout&quot;,</tspan></text>
<text x="24" y="848" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.keepalive-time&quot;,</tspan></text>
<text x="24" y="870" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.max-lifetime&quot;,</tspan></text>
<text x="24" y="892" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.leak-detection-threshold&quot;,</tspan></text>
<text x="24" y="914" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> &quot;spring.datasource.hikari.initialization-fail-timeout&quot;);</tspan></text>
<text x="24" y="936" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> (그 가드가 한 번 헛짚었던 자리)</tspan></text>
<text x="24" y="958" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> * &lt;p&gt;An earlier version matched the key&#x27;s leaf name with a regex and reported {@code</tspan></text>
<text x="24" y="980" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> * server.tomcat.connection-timeout: 20s} — a genuine {@code Duration} — as a defect. Flattening</tspan></text>
<text x="24" y="1002" fill="#e6edf3" font-size="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" xml:space="preserve"><tspan x="24" dy="0"> * through the real loader means the check is about the property this list names and not about</tspan></text>
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