Failed to generate ” + filter + ” – 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 Check-Up which can resolve issues that cause many errors.

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

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

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

XContentBuilder builder = XContentFactory.contentBuilder(XContentType.JSON);
 builder.map(filter);
 this.filter = Strings.toString(builder);
 return this;
 } catch (IOException e) {
 throw new ElasticsearchGenerationException("Failed to generate [" + filter + "]"; e);
 }
 } 
 public AliasActions filter(QueryBuilder filter) {
 if (filter == null) {

 

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