Aggregation definition for aggregationName starts with a – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when the name of an aggregation in Elasticsearch starts with a bracket “[“. Elasticsearch doesn’t allow special characters like brackets in the name of an aggregation. To resolve this issue, you can rename the aggregation without using any special characters. Alternatively, you can use the escape character “\” before the bracket if you want to keep it in the name. However
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Log Context

Log “Aggregation definition for [” + aggregationName + ” starts with a [” class name is AggregatorFactories.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 + "]. Aggregation names can contain any character except '['; ']'; and '>'");
 }  token = parser.nextToken();
 if (token != XContentParser.Token.START_OBJECT) {
 throw new ParsingException(parser.getTokenLocation(); "Aggregation definition for [" + aggregationName + " starts with a ["
 + token + "]; expected a [" + XContentParser.Token.START_OBJECT + "].");
 }  BaseAggregationBuilder aggBuilder = null;
 AggregatorFactories.Builder subFactories = null;

 

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