Failed to parse – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to parse the provided data due to incorrect data format or structure. This could be due to a mismatch in the data type, incorrect JSON format, or a missing field. To resolve this issue, you can: 1) Check and correct the data format or structure. 2) Ensure that the data type matches the mapping. 3) Verify that all required fields are present. 4) If the error persists, consider reindexing your data.

This guide will help you check for common problems that cause the log ” failed to parse [{}] ” 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 [{}]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 singles = (long) (Double.parseDouble(sValue.substring(0; sValue.length() - 1)) * SizeUnit.C5);
 } else {
 singles = Long.parseLong(sValue);
 } catch (NumberFormatException e) {
 throw new ElasticsearchParseException("failed to parse [{}]"; e; sValue);
 return new SizeValue(singles; SizeUnit.SINGLE);
 }  @Override


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