ElasticSearch報以下錯誤的解決辦法：
"type": "es_rejected_execution_exception",
"reason": "rejected execution of org.elasticsearch.transport.TransportService$4@1f9512f on EsThreadPoolExecutor[search, queue capacity = 1000, org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor@c0efba[Running, pool size = 7, active threads = 7, queued tasks = 1000, completed tasks = 573995]]"
解決方案：
上面報錯是因為queue capacity 不行了。需要增加產能：
