Malformed content after first object either the type field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch receives a malformed request, specifically when the type field is missing or incorrectly formatted in the JSON object. This could be due to a syntax error or incorrect data structure. To resolve this issue, you can: 1) Check the JSON syntax for any errors and correct them. 2) Ensure the type field is correctly included and formatted in the request. 3) Validate the structure of your data to ensure it matches the expected format.

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This guide will help you check for common problems that cause the log ” Malformed content; after first object; either the type field ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Malformed content; after first object; either the type field” class name is DocumentParser.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final XContentParser.Token token = parser.nextToken();
 if (token == XContentParser.Token.END_OBJECT) {
 // empty doc; we can handle it...
 return true;
 } else if (token != XContentParser.Token.FIELD_NAME) {
 throw new MapperParsingException("Malformed content; after first object; either the type field"
 + " or the actual properties should exist");
 }
 }
 return false;
 }

 

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