sequenceDiagram
    participant HEALTH as HEALTH Service
    participant INIT as health_initialize_rrdhost()
    participant LOAD as sql_health_alarm_log_load()
    participant DB as SQLite Database
    participant SPIN as health_log.spinlock

    Note over HEALTH,DB: HEALTH startup flow (current)

    INIT->>SPIN: rw_spinlock_init(&spinlock)
    Note over INIT,SPIN: (CHANGED order: now before load)
    INIT->>LOAD: sql_health_alarm_log_load(host)

    LOAD->>SPIN: rw_spinlock_read_lock()
    LOAD->>DB: sqlite3_step_monitored(res)
    DB-->>LOAD: SQLITE_ROW (row data)

    loop For each row
        LOAD->>HEALTH: service_running(SERVICE_HEALTH)?
        alt HEALTH is still running
            LOAD->>LOAD: Process row, create ALARM_ENTRY
            LOAD->>DB: sqlite3_step_monitored(res) for next row
            DB-->>LOAD: SQLITE_ROW or SQLITE_DONE
        else HEALTH signaled to stop
            LOAD->>LOAD: Exit loop early
            Note over LOAD: (prevents access after DB close)
        end
    end

    LOAD->>SPIN: rw_spinlock_read_unlock()
    LOAD-->>INIT: Return

    Note over HEALTH,DB: HEALTH shutdown sequence (race fixed)

    HEALTH->>HEALTH: service_signal_exit(SERVICE_HEALTH)
    HEALTH->>DB: sqlite_close_databases()
    Note over HEALTH,DB: LOAD loop already exited, no dangling step()