---
phase: 02-transaction-search-diagrams
plan: 04
subsystem: database
tags: [clickhouse, diagram-linking, surefire, testcontainers, awaitility]

# Dependency graph
requires:
  - phase: 02-transaction-search-diagrams (plans 01-03)
    provides: ClickHouse schema, execution repository, diagram repository, ingestion pipeline
provides:
  - diagram_content_hash populated during execution ingestion (DIAG-02 complete)
  - stable mvn clean verify with classloader isolation
affects: [03-agent-registry-sse, 04-security-api-docs]

# Tech tracking
tech-stack:
  added: []
  patterns: [awaitility ignoreExceptions for ClickHouse eventual consistency, surefire reuseForks=false for ELK classloader isolation]

key-files:
  created:
    - cameleer-server-app/src/test/java/com/cameleer/server/app/storage/DiagramLinkingIT.java
  modified:
    - cameleer-server-app/src/main/java/com/cameleer/server/app/storage/ClickHouseExecutionRepository.java
    - cameleer-server-app/pom.xml
    - cameleer-server-app/src/test/java/com/cameleer/server/app/storage/IngestionSchemaIT.java
    - cameleer-server-app/src/test/java/com/cameleer/server/app/controller/SearchControllerIT.java

key-decisions:
  - "DiagramRepository injected via constructor into ClickHouseExecutionRepository for diagram hash lookup during batch insert"
  - "Awaitility ignoreExceptions pattern adopted for all ClickHouse polling assertions to handle EmptyResultDataAccessException during flush delay"
  - "Surefire and Failsafe both configured with reuseForks=false to isolate ELK static initializer from Spring Boot classloader"

patterns-established:
  - "Awaitility ignoreExceptions: all awaitility assertions polling ClickHouse must use .ignoreExceptions() to tolerate EmptyResultDataAccessException before data is flushed"

requirements-completed: [DIAG-02]

# Metrics
duration: 22min
completed: 2026-03-11
---

# Phase 2 Plan 4: Gap Closure Summary

**Diagram hash linking during execution ingestion via DiagramRepository lookup, plus Surefire/Failsafe classloader isolation and test stability fixes**

## Performance

- **Duration:** 22 min
- **Started:** 2026-03-11T16:13:57Z
- **Completed:** 2026-03-11T16:36:49Z
- **Tasks:** 1
- **Files modified:** 5

## Accomplishments
- diagram_content_hash populated with active RouteGraph SHA-256 hash during batch insert (DIAG-02 fully satisfied)
- DiagramLinkingIT integration test proves both positive (hash populated) and negative (empty fallback) cases
- `mvn clean verify` passes reliably -- 51 tests, 0 failures, 0 errors
- Fixed flaky test failures caused by EmptyResultDataAccessException in awaitility polling

## Task Commits

Each task was committed atomically:

1. **Task 1: Populate diagram_content_hash during ingestion and fix Surefire forks** - `34c8310` (feat)

**Plan metadata:** (pending)

## Files Created/Modified
- `cameleer-server-app/src/main/java/com/cameleer/server/app/storage/ClickHouseExecutionRepository.java` - Added DiagramRepository injection, diagram hash lookup in insertBatch
- `cameleer-server-app/pom.xml` - Added maven-surefire-plugin and maven-failsafe-plugin with reuseForks=false
- `cameleer-server-app/src/test/java/com/cameleer/server/app/storage/DiagramLinkingIT.java` - Integration test for diagram hash linking
- `cameleer-server-app/src/test/java/com/cameleer/server/app/storage/IngestionSchemaIT.java` - Added ignoreExceptions + increased timeouts
- `cameleer-server-app/src/test/java/com/cameleer/server/app/controller/SearchControllerIT.java` - Adjusted pagination assertion count

## Decisions Made
- DiagramRepository injected via constructor into ClickHouseExecutionRepository -- both are @Repository Spring beans, so constructor injection autowires cleanly
- Used `ignoreExceptions()` in awaitility chains rather than switching from `queryForObject` to `queryForList`, since ignoreExceptions is the canonical awaitility pattern for eventual consistency
- Surefire AND Failsafe both need reuseForks=false -- ELK's LayeredMetaDataProvider static initializer poisons the JVM classloader for subsequent Spring Boot test contexts

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Fixed flaky integration tests due to awaitility not retrying EmptyResultDataAccessException**
- **Found during:** Task 1 (verification step)
- **Issue:** Awaitility's `untilAsserted` was not retrying `EmptyResultDataAccessException` thrown by `queryForObject` when data hadn't been flushed yet, causing intermittent test failures
- **Fix:** Added `.ignoreExceptions()` to all awaitility assertions that poll ClickHouse with `queryForObject`, and increased IngestionSchemaIT timeouts from 10s to 30s
- **Files modified:** DiagramLinkingIT.java, IngestionSchemaIT.java
- **Verification:** `mvn clean verify` passes with 51/51 tests green
- **Committed in:** 34c8310 (part of Task 1 commit)

**2. [Rule 1 - Bug] Fixed SearchControllerIT pagination assertion count**
- **Found during:** Task 1 (verification step)
- **Issue:** Pagination test asserted >= 8 COMPLETED executions but seed data only contains 7 COMPLETED (execs 2,4 are FAILED, exec 3 is RUNNING)
- **Fix:** Changed assertion to `isGreaterThanOrEqualTo(7)`
- **Files modified:** SearchControllerIT.java
- **Verification:** Test passes consistently
- **Committed in:** 34c8310 (part of Task 1 commit)

---

**Total deviations:** 2 auto-fixed (2 bugs)
**Impact on plan:** Both fixes required for test reliability. No scope creep.

## Issues Encountered
- Initial `mvn clean verify` had 3 test failures (DiagramLinkingIT x2, IngestionSchemaIT x1) all caused by `EmptyResultDataAccessException` in awaitility assertions. Root cause: awaitility was propagating the exception immediately instead of retrying. Fixed by adding `ignoreExceptions()`.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Phase 2 fully complete: ingestion, search, detail, diagrams, and now diagram-execution linking
- DIAG-02 requirement satisfied: transactions link to the RouteGraph version active at execution time
- Test suite stable at 51 tests with classloader isolation

---
*Phase: 02-transaction-search-diagrams*
*Completed: 2026-03-11*
