No parameter named and type OBJECT – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is expecting a parameter of type OBJECT but it is not provided in the request. This could be due to a missing or incorrectly formatted parameter in your request. To resolve this issue, you should first check your request syntax and ensure that all required parameters are included and correctly formatted. If the error persists, you may need to review the OpenSearch documentation to understand the expected format and requirements for the OBJECT type parameter. Lastly, ensure that your OpenSearch version supports the operation you are trying to perform.

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This guide will help you check for common problems that cause the log ” no parameter named [{}] and type OBJECT ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “no parameter named [{}] and type OBJECT” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 } else if (token == XContentParser.Token.START_OBJECT && currentFieldName != null) {
 if ("parameters".equals(currentFieldName)) {
 TermVectorsRequest.parseRequest(template; parser);
 } else {
 throw new OpenSearchParseException("no parameter named [{}] and type OBJECT"; currentFieldName);
 } else if (currentFieldName != null) {
 throw new OpenSearchParseException("_mtermvectors: Parameter [{}] not supported"; currentFieldName);


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