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报错日志：
网上写elasticsearch也有很多文章，都写的挺好的，目前想把错误日志以及解决方法写出来，希望一些小伙伴能尽快躲开些问题，把时间花在一些有用的事情上。错误日志{"error": {"root_cause": [{"type": "mapper_parsing_exception","reason": "analyzer on field [word] must be set when search_analyzer is set"}],"type": "mapper_parsing_exception","reason": "Failed to parse mapping [doc]: analyzer on field [word] must be set when search_analyzer is set","caused_by": {"type": "mapper_parsing_exception","reason": "analyzer on field [word] must be set when search_analyzer is set"}},"status": 400} 建立索引的条件：
{ "settings": { "number_of_shards": 1, "analysis": { "filter": { "ngram_filter": { "type": "ngram", "min_gram": 2, "max_gram": 20 } }, "analyzer": { "ngram_analyzer": { "type": "custom", "tokenizer": "standard", "filter": [ "lowercase", "ngram_filter" ] } } } }, "mappings": { "doc": { "_all": { "type": "text", ** "index_analyzer": "ngram_analyzer",** "search_analyzer": "standard" }, "properties": { "word": { "type": "text", ** "index_analyzer": "ngram_analyzer",** "search_analyzer": "standard" }, "definition": { "type": "text" } } } }} 为什么呢？因为mappings里有写参数在elasticsearch5版本里不支持了，index_analyzer就不支持了，改成了analyzer，改过来，就好了，可以建立索引成功。
转载于:https://blog.51cto.com/shangdc/2169302