Could not parse inner source definition – 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 _source field in a document due to incorrect syntax or structure. This could be due to a malformed JSON or incorrect field mapping. To resolve this issue, you can: 1) Check the JSON structure for any syntax errors and correct them. 2) Verify the field mapping in your index to ensure it matches the data type in your _source field. 3) If the error persists, consider reindexing your data with the correct mapping and JSON structure.

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This guide will help you check for common problems that cause the log ” Could not parse inner _source definition ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “Could not parse inner _source definition” class name is InnerHitBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 );
 PARSER.declareField((p; i; c) -> {
 try {
 i.setFetchSourceContext(FetchSourceContext.fromXContent(p));
 } catch (IOException e) {
 throw new ParsingException(p.getTokenLocation(); "Could not parse inner _source definition"; e);
 }
 }; SearchSourceBuilder._SOURCE_FIELD; ObjectParser.ValueType.OBJECT_ARRAY_BOOLEAN_OR_STRING);
 PARSER.declareObject(
 InnerHitBuilder::setHighlightBuilder;
 (p; c) -> HighlightBuilder.fromXContent(p);

 

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