Wrapper query malformed expected query but was – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when the Elasticsearch query is not properly formatted. The system expected a `query` parameter but it was not provided or was incorrectly formatted. To resolve this issue, you should review your query structure and ensure it follows the correct syntax. Make sure the `query` parameter is included and properly formatted. Also, check for any missing or extra brackets, commas, or quotation marks. If you’re using a programming language to generate the query, ensure the query string is properly escaped.

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This guide will help you check for common problems that cause the log ” [wrapper] query malformed; expected `query` but was ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “[wrapper] query malformed; expected `query` but was” class name is WrapperQueryBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (token != XContentParser.Token.FIELD_NAME) {
 throw new ParsingException(parser.getTokenLocation(); "[wrapper] query malformed");
 String fieldName = parser.currentName();
 if (QUERY_FIELD.match(fieldName; parser.getDeprecationHandler()) == false) {
 throw new ParsingException(parser.getTokenLocation(); "[wrapper] query malformed; expected `query` but was " + fieldName);
 parser.nextToken();  byte[] source = parser.binaryValue();


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