schema_version: 1
id: region-unavailable-escalation-during-incident-window
title: Region unavailable investigation that must escalate beyond region-health symptoms
status: draft
owner: codex
environment:
  profile: stable-dedicated
  cluster_id: '10494879535987031038'
  cluster_type: dedicated
  tidb_version: v7.5.5
time_window:
  incident_at: '2026-06-16T06:30:00Z'
  allowed:
  - id: workspace_observed_window
    start: '2026-06-16T06:29:00Z'
    end: '2026-06-16T07:13:00Z'
prompt:
  text: |
    请帮我分析集群 10494879535987031038 在 2026-06-16T06:29:00Z 到 2026-06-16T07:13:00Z 这个时间窗内发生了什么。业务侧反馈该时段出现 `Region is unavailable` 报错。请判断最可能的根因，并给出关键证据链、影响判断和处理建议。
tags:
- service-unavailable
- region-health
- tikv
- escalation-path
- diagnosis-quality
case_tier: P0
cost_tier: low
followup:
  scheduled_max_followups: 0
execution:
  acp_bash_timeout_s: 300