Failed to parse document is empty – 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 tries to index an empty document. Elasticsearch requires a document to have at least some content to be indexed. To resolve this issue, ensure that the document you’re trying to index is not empty. Check your data source or the process that generates the document for any issues that might cause it to produce an empty document. Alternatively, you can add a validation step before indexing to prevent empty documents from being sent to Elasticsearch.

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This guide will help you check for common problems that cause the log ” failed to parse; document is empty ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, document.

Log Context

Log “failed to parse; document is empty” class name is DocumentParser.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 * @return the parsed document
 * @throws DocumentParsingException whenever there's a problem parsing the document
 */
 public ParsedDocument parseDocument(SourceToParse source; MappingLookup mappingLookup) throws DocumentParsingException {
 if (source.source() != null && source.source().length() == 0) {
 throw new DocumentParsingException(new XContentLocation(0; 0); "failed to parse; document is empty");
 }
 final RootDocumentParserContext context;
 final XContentType xContentType = source.getXContentType();
 try (XContentParser parser = XContentHelper.createParser(parserConfiguration; source.source(); xContentType)) {
 context = new RootDocumentParserContext(mappingLookup; mappingParserContext; source; parser);

 

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