[QA-A] OpenSearch Migration — Scenario A: Regression (Phase 0 / No Phase Set)

[fabrizzio-dotCMS]

Description

Validate that all existing Elasticsearch functionality is completely unaffected by the OpenSearch migration work when no phase flag is set.

Parent sub-epic: #35476
Parent epic: #34164
Test plan reference: Section 5 — Scenario A

Acceptance Criteria

• A-1: dotCMS starts normally with no FEATURE_FLAG_OPEN_SEARCH_PHASE set (or set to 0). Startup log shows Phase 0. No OS connection attempted.
• A-1: Verify ES indices in Kibana (GET /_cat/indices?v) — working and live indices present.
• A-1: Create and publish a content item. Content appears in ES (visible in Kibana). No OS writes in logs.
• A-1: Run a full reindex from dotCMS admin panel. Reindex completes. Record count in ES matches contentlet count.

Additional Context

Environment:

• Docker Compose stack: docker/docker-compose-examples/os-migration/docker-compose.yml
• ES 7.10 on port 9200 / Kibana on 5601
• OpenSearch stack may be running or not — should not matter for Phase 0

Config:

FEATURE_FLAG_OPEN_SEARCH_PHASE=0

Depends on: #35476

[fabrizzio-dotCMS]

Superseded by new sub-issues created under #35476 based on the updated test plan (PR #35632). Closing in favor of the new granular task breakdown.