Failed to parse content to map – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch is unable to parse the provided content into a map. This is usually due to incorrect or malformed JSON syntax. To resolve this issue, you can validate your JSON syntax using a JSON validator. Ensure that all keys and values are properly enclosed in double quotes, and that nested objects and arrays are correctly formatted. Additionally, check for missing or extra commas, colons, or brackets. If you’re using a programming language to generate the JSON, ensure that it’s correctly serializing the data.

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This guide will help you check for common problems that cause the log ” Failed to parse content to map ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “Failed to parse content to map” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public static Map convertToMap(XContent xContent; String string; boolean ordered) throws ElasticsearchParseException {
 try (XContentParser parser = xContent.createParser(XContentParserConfiguration.EMPTY; string)) {
 return ordered ? parser.mapOrdered() :;
 } catch (IOException e) {
 throw new ElasticsearchParseException("Failed to parse content to map"; e);
 }  /**
 * The same as {@link XContentHelper#convertToMap(XContent; byte[]; int; int; boolean; Set; Set)} but none of the


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