【总结】ElasticSearch创建索引失败，超过maximum shards

问题现象

创建新的es索引报错，报错信息上说，es已经超过最大的分片数。

错误详情

关键错误信息：but this cluster currently has [999]/[1000] maximum shards open;

详细错误信息：

Caused by: org.elasticsearch.client.ResponseException: method [PUT], host [http://10.58.14.34:9200], URI [/janusgraph_idx_customer_cust_num], status line [HTTP/1.1 400 Bad Request]
{
    "error": {
        "root_cause": [
            {
                "type": "validation_exception",
                "reason": "Validation Failed: 1: this action would add [2] total shards, but this cluster currently has [999]/[1000] maximum shards open;"
            }
        ],
        "type": "validation_exception",
        "reason": "Validation Failed: 1: this action would add [2] total shards, but this cluster currently has [999]/[1000] maximum shards open;"
    },
    "status": 400
}

问题解决

更改es的最大分片数配置：

curl -X PUT "localhost:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d '
{
"persistent" : {
"cluster" : {
"max_shards_per_node" : "5000"
}
}
}'

需要注意的是，我们这里是在 persistent 节点中设置的参数。ES 集群的 setting 配置中包含两种类型：
persistent：永久生效的配置项
transient：临时生效的配置项，集群重启就会失效文章来源地址https://uudwc.com/A/jA83e