springboot 集成 es6

1. Invalid index name must be lowercase

2. Failed to parse mapping [doc]: Could not convert [user_name.index] to boolean

3.Failed to parse mapping [doc]: analyzer [ik_max_word] not found for field [user_name]

4. Failed to parse mapping [doc]: No handler for type [int] declared on field [duration]

5.Elasticsearch从5.X就引入了text和keyword，其中keyword适用于不分词字段,搜索时只能完全匹配,这时string还保留着,6.X移除string了。 

6. Field [_id] is a metadata field and cannot be added inside a document. Use the index API request parameters.

7. Elasticsearch exception [type=cluster_block_exception, reason=blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];]