Function waitStarRocksReady

backend/common/testcontainer/testcontainer.go:347–361

waitStarRocksReady blocks until at least one StarRocks backend is registered and alive, which is required before tablet-allocating DDL (CREATE TABLE) succeeds. The check is read-only on purpose: issuing DDL during allin1's first-boot disrupts backend registration, so poll SHOW BACKENDS rather than p

(ctx context.Context, db *sql.DB)

// read-only on purpose: issuing DDL during allin1's first-boot disrupts backend
// registration, so poll SHOW BACKENDS rather than probing with CREATE TABLE.
func waitStarRocksReady(ctx context.Context, db *sql.DB) error {
	ticker := time.NewTicker(3 * time.Second)
	defer ticker.Stop()
	timeout := time.After(10 * time.Minute)
	for {
		select {
		case <-ticker.C:
			if starRocksBackendAlive(ctx, db) {
				return nil
			}
		case <-timeout:
			return errors.Errorf("StarRocks backend did not become ready")
		}
	}
}

// starRocksBackendAlive reports whether SHOW BACKENDS lists a backend with Alive=true.
func starRocksBackendAlive(ctx context.Context, db *sql.DB) bool {