已解决:Elasticsearch报错:exception [type=search

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已解决:Elasticsearch报错:exception [type=search

2024-05-08 14:52| 来源: 网络整理| 查看: 265

  Exception in thread "main" ElasticsearchStatusException[Elasticsearch exception [type=search_phase_execution_exception, reason=all shards failed]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]]; at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:177) at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:1727) at org.elasticsearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:1704) at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1467) at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1424) at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1394) at org.elasticsearch.client.RestHighLevelClient.search(RestHighLevelClient.java:930) at com.softsec.util.demoTime.main(demoTime.java:98) Suppressed: org.elasticsearch.client.ResponseException: method [POST], host [http://192.168.101.92:9200], URI [/news/_search?typed_keys=true&ignore_unavailable=false&expand_wildcards=open&allow_no_indices=true&ignore_throttled=true&search_type=query_then_fetch&batched_reduce_size=512&ccs_minimize_roundtrips=true], status line [HTTP/1.1 400 Bad Request] {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query","grouped":true,"failed_shards":[{"shard":0,"index":"news","node":"8GuMfo5aRz2CCgl49bY0aQ","reason":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}],"caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.","caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}},"status":400} at org.elasticsearch.client.RestClient.convertResponse(RestClient.java:253) at org.elasticsearch.client.RestClient.performRequest(RestClient.java:231) at org.elasticsearch.client.RestClient.performRequest(RestClient.java:205) at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1454) ... 4 more   这个原因是因为我的分组聚合查询的字符串(content_type)类型是text类型 原因分析: 当使用到term 查询的时候,由于是精准匹配,所以查询的关键字在es上的类型,必须是keyword而不能是text,比如你的搜索条件是 ”name”:”蔡虚坤”,那么该name 字段的es类型得是keyword,而不能是text 在es中,只有keyword类型的字符串可以使用AggregationBuilders.terms("aggs-class")来分组聚合,想要分组查询,指定根据分组字段的keyword属性就可以了(如下图);

在我们的Java代码中怎么修改呢?如下,加上".keyword"就可以了

 

之前的报错下面追加上:

分片配置

•在创建索引时,如果不指定分片配置,则默认主分片1,副本分片1。

•在创建索引时,可以通过settings设置分片

在这里插入图片描述

在这里插入图片描述

分片配置

#分片配置 #"number_of_shards": 3, 主分片数量 #"number_of_replicas": 1 主分片备份数量,每一个主分片有一个备份 # 3个主分片+3个副分片=6个分片 PUT cluster_test1 { "settings": { "number_of_shards": 3, "number_of_replicas": 1 }, "mappings": { "properties": { "name":{ "type": "text" } } } }

1.三个节点正常运行(0、1、2分片标号)

在这里插入图片描述

2.cluster-3 挂掉

在这里插入图片描述

3.将挂掉节点的分片,自平衡到其他节点

在这里插入图片描述

4.cluster-3 恢复正常后,节点分片将自平衡回去(并不一定是原来的分片)

在这里插入图片描述

分片与自平衡

•当节点挂掉后,挂掉的节点分片会自平衡到其他节点中

注意:分片数量一旦确定好,不能修改。

索引分片推荐配置方案:

1.每个分片推荐大小10-30GB

2.分片数量推荐 = 节点数量 * 1~3倍

思考:比如有1000GB数据,应该有多少个分片?多少个节点

1.每个分片20GB 则可以分为40个分片

2.分片数量推荐 = 节点数量 * 1~3倍 --> 40/2=20 即20个节点

ElasticSearch高级-脚本和JavaAPI的bulk批量操作、查询操作(match、term、模糊、布尔、聚合、高亮...)、ES集群搭建与管理_es bulk java-CSDN博客

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【二十七】springboot之通过threadLocal+参数解析器实现同session一样保存当前登录信息的功能 

 



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