已解決：Elasticsearch報錯：exception [type=search_phase_execution_exception, reason=all shards failed]

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

這個緣由是由於個人分組聚合查詢的字符串（content_type）類型是text類型

緣由分析：

當使用到term 查詢的時候，因爲是精準匹配，因此查詢的關鍵字在es上的類型，必須是keyword而不能是text，好比你的搜索條件是 」name」:」蔡虛坤」,那麼該name 字段的es類型得是keyword，而不能是text

在es中，只有keyword類型的字符串能夠使用AggregationBuilders.terms("aggs-class")來分組聚合，想要分組查詢，指定根據分組字段的keyword屬性就能夠了（以下圖）；

在咱們的Java代碼中怎麼修改呢?以下，加上".keyword"就能夠了

 

以前的報錯下面追加上：

 

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