一个redias，两个l，分别为l6.1和l7.0，两个e，分别为e6.1和e7.0,l6到e6.1, l7.0到 e7.0 ,两个l，两个e分别在同一机器上，l7报400错误。

一个redias 两个logstash，分别为logstah6.1和logstash7.0，两个elasticsearch，分别为e6.1和e7.0,logstahs6 output到e6.1, logstash7.0 output到 e7.0 ,两个logstash在一台机器上，两个elasticsearch 在一个机器上，logstash7起不起来，报400错误。

[WARN ][logstash.outputs.elasticsearch] Could not index event to Elasticsearch. {:status=>400, :action=>["index", {:_id=>nil, :_index=>"zznu-logstash", :_type=>"_doc", :routing=>nil}, #<LogStash::Event:0x58d9aa73>], :response=>{"index"=>{"_index"=>"zznu-logstash", "_type"=>"_doc", "_id"=>"oF6KMGoBc9j4XKNweVBa", "status"=>400, "error"=>{"type"=>"illegal_argument_exception", "reason"=>"mapper [message] of different type, current_type [text], merged_type [date]"}}}}