Elasticsearch常见错误

一 read_only_allow_delete" : "true"

当我们在向某个索引添加一条数据的时候，可能（极少情况）会碰到下面的报错：

{
  "error": {
    "root_cause": [
      {
        "type": "cluster_block_exception",
        "reason": "blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"
      }
    ],
    "type": "cluster_block_exception",
    "reason": "blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"
  },
  "status": 403
}

上述报错是说索引现在的状态是只读模式（read-only），如果查看该索引此时的状态：

GET z1/_settings
# 结果如下
{
  "z1" : {
    "settings" : {
      "index" : {
        "number_of_shards" : "5",
        "blocks" : {
          "read_only_allow_delete" : "true"
        },
        "provided_name" : "z1",
        "creation_date" : "1556204559161",
        "number_of_replicas" : "1",
        "uuid" : "3PEevS9xSm-r3tw54p0o9w",
        "version" : {
          "created" : "6050499"
        }
      }
    }
  }
}

可以看到"read_only_allow_delete" : "true"，说明此时无法插入数据，当然，我们也可以模拟出来这个错误：

PUT z1
{
  "mappings": {
    "doc": {
      "properties":