问题
Does elasticsearch does not return the same results in the same order every time a query is executed because of its algorithm in calculating the score? Or is it something else? Is there a way to make it such that the results return in the same order everytime a query is executed? Is this normal?
回答1:
This might to do with the way elastic search calculates relevancy scores locally by default.
Try adding:
&search_type=dfs_query_then_fetch
to your query and see if that helps. This tells ES to calculate scores across the whole cluster.
More info:
http://www.elasticsearch.org/blog/understanding-query-then-fetch-vs-dfs-query-then-fetch/
来源：https://stackoverflow.com/questions/18091571/is-elasticsearch-non-deterministic