ES：Compressor detection can only be called on some xcontent bytes or compressed xcontent bytes

Cause of occurrence

• Study ES in Java HighLevel Rest Client client API

Running environment

• elasticsearch edition ：7.12.1
• jdk edition ：jdk-8
• computer system ：win10
• Idea edition ：2021.2

Error message

org.elasticsearch.common.compress.NotXContentException: Compressor detection can only be called on some xcontent bytes or compressed xcontent bytes

	at org.elasticsearch.common.compress.CompressorFactory.compressor(CompressorFactory.java:42)
	at org.elasticsearch.common.xcontent.XContentHelper.convertToMap(XContentHelper.java:108)
	at org.elasticsearch.client.indices.CreateIndexRequest.source(CreateIndexRequest.java:276)
	at org.elasticsearch.client.indices.CreateIndexRequest.source(CreateIndexRequest.java:257)
	at com.linxuan.hotel.HotelDemoApplicationTests.createHotelIndex(HotelDemoApplicationTests.java:33)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at java.util.ArrayList.forEach(ArrayList.java:1249)

Analysis and investigation

• Compressor detection can only be called on some xcontent bytes or compressed xcontent bytes
• Compressor detection can only be performed in certain xcontent Bytes or compressed xcontent Byte above call

The error can be located to HotelDemoApplicationTests.java:33 That's ok , The code is as follows ：

@Test
void createHotelIndex() throws IOException {
    
    // 1. establish Request object 
    CreateIndexRequest request = new CreateIndexRequest("hotel");
    // 2. Prepare the requested parameters  DSL sentence 
    // 33 That's ok   Report errors 
    request.source(MAPPING_TEMPLATE, XContentType.JSON);
    // 3. Send a request 
    client.indices().create(request, RequestOptions.DEFAULT);
}

Then you can turn the error information into human words ： The type of statement is not JSON Stylized or JSON Format error .

location MAPPING_TEMPLATE, The code is as follows ：

public static final String MAPPING_TEMPLATE = "PUT /hotel\n" +
            "{\n" +
            " \"mappings\": {\n" +
            " \"properties\": {\n" +
            " \"id\": {\n" +
            " \"type\": \"keyword\"\n" +
            " },\n" +
            " \"name\":{\n" +
            " \"type\": \"text\",\n" +
            " \"analyzer\": \"ik_max_word\",\n" +
            " \"copy_to\": \"all\"\n" +
            " },\n" +
            " \"address\":{\n" +
            " \"type\": \"keyword\",\n" +
            " \"index\": false\n" +
            " },\n" +
            " \"all\":{\n" +
            " \"type\": \"text\",\n" +
            " \"analyzer\": \"ik_max_word\"\n" +
            " }\n" +
            " }\n" +
            " }\n" +
            "}\n";

OK, The reason is found , Because this code is added ："PUT /hotel\n" +. Delete it .