def validate_scan_result(results):
        """ Check if there's a failed shard in the scan query"""
        if results[EsConst.SHARDS][EsConst.FAILED] and results[EsConst.SHARDS][EsConst.FAILED] > 0:
            raise ScanError(
                'Scroll request has failed on %d shards out of %d.' %
                (results[EsConst.SHARDS][EsConst.FAILED], results[EsConst.SHARDS][EsConst.TOTAL])
            )
Check if there's a failed shard in the scan query