项目场景：

今天在用java写代码查ES中数据的时候，出现了下面提示的错误，我排查了一会才发现问题

控制台提示

ElasticsearchStatusException[Elasticsearch exception [type=mapper_parsing_exception, reason=failed to parse field [location] of type [geo_point]]
]; nested: ElasticsearchException[Elasticsearch exception [type=parse_exception, reason=unsupported symbol [.] in geohash [30.871729121.81959]]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=unsupported symbol [.] in geohash [30.871729121.81959]]];
	at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:176)
	at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:2011)
	at org.elasticsearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:1988)
	at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1745)
	at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1702)
	at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1672)
	at org.elasticsearch.client.RestHighLevelClient.index(RestHighLevelClient.java:1029)
	at com.woniu.EsDemoApplicationTests.insertDoc(EsDemoApplicationTests.java:115)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at 
	at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)
	at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
	Suppressed: org.elasticsearch.client.ResponseException: method [PUT], host [http://120.48.46.177:9200], URI [/hotel/_doc/45870?timeout=1m], status line [HTTP/1.1 400 Bad Request]
Warnings: [Elasticsearch built-in security features are not enabled. Without authentication, your cluster could be accessible to anyone. See https://www.elastic.co/guide/en/elasticsearch/reference/7.16/security-minimal-setup.html to enable security.]
{"error":{"root_cause":[{"type":"parse_exception","reason":"unsupported symbol [.] in geohash [30.871729121.81959]"}],"type":"mapper_parsing_exception","reason":"failed to parse field [location] of type [geo_point]","caused_by":{"type":"parse_exception","reason":"unsupported symbol [.] in geohash [30.871729121.81959]","caused_by":{"type":"illegal_argument_exception","reason":"unsupported symbol [.] in geohash [30.871729121.81959]"}}},"status":400}
		at org.elasticsearch.client.RestClient.convertResponse(RestClient.java:326)
		at org.elasticsearch.client.RestClient.performRequest(RestClient.java:296)
		at org.elasticsearch.client.RestClient.performRequest(RestClient.java:270)
		at org.elasticsearch.client.RestHighLevelClient.performClientRequest(RestHighLevelClient.java:2082)
		at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1732)
		... 71 more
Caused by: ElasticsearchException[Elasticsearch exception [type=parse_exception, reason=unsupported symbol [.] in geohash [30.871729121.81959]]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=unsupported symbol [.] in geohash [30.871729121.81959]]];
	at org.elasticsearch.ElasticsearchException.innerFromXContent(ElasticsearchException.java:485)
	at org.elasticsearch.ElasticsearchException.fromXContent(ElasticsearchException.java:396)
	at org.elasticsearch.ElasticsearchException.innerFromXContent(ElasticsearchException.java:426)
	at org.elasticsearch.ElasticsearchException.failureFromXContent(ElasticsearchException.java:592)
	at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:168)
	... 74 more
Caused by: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=unsupported symbol [.] in geohash [30.871729121.81959]]]
	at org.elasticsearch.ElasticsearchException.innerFromXContent(ElasticsearchException.java:485)
	at org.elasticsearch.ElasticsearchException.fromXContent(ElasticsearchException.java:396)
	at org.elasticsearch.ElasticsearchException.innerFromXContent(ElasticsearchException.java:426)

原因分析：

ES中地理坐标属性location的数据结构是（纬度，经度），而我在进行字符串拼接的时候后了中间的逗号，导致插入数据错误。下面就是上面那一段代码真正有用的部分。

真正错误原因：

{"error":{"root_cause":[{"type":"parse_exception","reason":"unsupported symbol [.] in 
geohash [30.871729121.81959]"}],"type":"mapper_parsing_exception","reason":"failed to parse 
field [location] of type [geo_point]","caused_by":{"type":"parse_exception","reason":"unsupported symbol [.] in geohash 
[30.871729121.81959]","caused_by":
{"type":"illegal_argument_exception","reason":"unsupported symbol [.] in geohash 
[30.871729121.81959]"}}},"status":400}

错误写法：

this.location = hotel.getLatitude()+hotel.getLongitude();

正确写法： 

this.location = hotel.getLatitude()+","+hotel.getLongitude();

解决方案：

字符串拼接前要多检查，并且（纬度，经度）这个顺序不能颠倒，不然可能会导致地理位置错误。