Expected START OBJECT but got parser currentToken – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7-8.9

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Briefly, this error occurs when Elasticsearch expects a JSON object to start (START_OBJECT) but encounters a different type of data. This is usually due to incorrect or malformed JSON input. To resolve this issue, you can: 1) Check the JSON input for syntax errors or misplaced commas, brackets, or braces. 2) Validate your JSON input using a JSON validator tool. 3) Ensure that the JSON input matches the expected structure for the Elasticsearch API you’re using.

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This guide will help you check for common problems that cause the log ” Expected [START_OBJECT] but got [” + parser.currentToken() + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: parser, query, index.

Log Context

Log “Expected [START_OBJECT] but got [” + parser.currentToken() + “]” class name is IntervalQueryBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (parser.nextToken() != XContentParser.Token.FIELD_NAME) {
 throw new ParsingException(parser.getTokenLocation(); "Expected [FIELD_NAME] but got [" + parser.currentToken() + "]");
 }
 String field = parser.currentName();
 if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
 throw new ParsingException(parser.getTokenLocation(); "Expected [START_OBJECT] but got [" + parser.currentToken() + "]");
 }
 String name = null;
 float boost = 1;
 IntervalsSourceProvider provider = null;
 String providerName = null;

 

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