{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count"}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query","grouped":true,"failed_shards":[{"shard":0,"index":"web_cha123_lks_gongsi34","node":"284qAPYlSwKW9GkfIqnpyg","reason":{"type":"illegal_argument_exception","reason":"numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count"}}],"caused_by":{"type":"illegal_argument_exception","reason":"numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count","caused_by":{"type":"illegal_argument_exception","reason":"numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count"}}},"status":400}