Invalid group name – 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 ” Invalid group name ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

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 “Invalid group name [“classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { 
 ensureExpectedToken(XContentParser.Token.FIELD_NAME; token; parser::getTokenLocation);
 String destinationFieldName = parser.currentName();
 if (validAggMatcher.reset(destinationFieldName).matches() == false) {
 throw new ParsingException(parser.getTokenLocation(); "Invalid group name [" + destinationFieldName
 + "]. Group names can contain any character except '['; ']'; and '>'");
 token = parser.nextToken();
 ensureExpectedToken(XContentParser.Token.START_OBJECT; token; parser::getTokenLocation);


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