Today, when I was writing code in Java to check the data in ES, the following error occurred. I checked it for a while and found the problem

Console prompt

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)

Cause analysis:

The data structure of the geographic coordinate attribute location in ES is (latitude, longitude), and I inserted a comma in the middle when I spliced strings, resulting in an error in inserting data. Here are the really useful parts of the above code.

Real error reason:

{"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}

Incorrect writing:

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

Correct writing:

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

Solution:

Check the string before splicing, and the order (latitude and longitude) cannot be reversed, otherwise it may lead to geographical location errors.