Failed to generate ” + source + ” – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

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This guide will help you check for common problems that cause the log ” Failed to generate ” + source + ” ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: admin, source, settings and cluster.


Log Context

Log “Failed to generate [” + source + “]”classname  is ClusterUpdateSettingsRequest.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

try {
 XContentBuilder builder = XContentFactory.contentBuilder(XContentType.JSON);
 builder.map(source);
 transientSettings(Strings.toString(builder); builder.contentType());
 } catch (IOException e) {
 throw new ElasticsearchGenerationException("Failed to generate [" + source + "]"; e);
 }
 return this;
 } 
 /**

 

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