Expected an object but found instead – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch expects a JSON object but receives an empty object or an incorrect data type. This could be due to a malformed request body or incorrect data structure. To resolve this, ensure that the data being sent is in the correct format and structure as expected by Elasticsearch. Also, check your request body for any syntax errors or missing elements. If you’re using a client library to interact with Elasticsearch, ensure it’s correctly configured and up-to-date.

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This guide will help you check for common problems that cause the log ” expected an object but found [{}] instead ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “expected an object but found [{}] instead” class name is WatchStatus.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return builder.endObject();
 }  public static State parse(XContentParser parser) throws IOException {
 if (parser.currentToken() != XContentParser.Token.START_OBJECT) {
 throw new ElasticsearchParseException("expected an object but found [{}] instead"; parser.currentToken());
 boolean active = true;
 ZonedDateTime timestamp = ZonedDateTime.now(ZoneOffset.UTC);
 String currentFieldName = null;
 XContentParser.Token token;


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