Unexpected token token expected - How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch encounters an unexpected token in a query or configuration, where it expected an ID code. This could be due to a syntax error, incorrect data type, or a misplaced identifier. To resolve this, you should first check the syntax of your query or configuration for any errors. Ensure that all identifiers are correctly placed and that the correct data types are used. If the error persists, try to isolate the problematic part of your query or configuration by testing each part individually.

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This guide will help you check for common problems that cause the log ” unexpected token [” + token + “]; expected [; ; {] " to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log "unexpected token [" + token + "]; expected [; ; {]" class name is ScriptMetadata.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 id = null;  break;
 throw new ParsingException(parser.getTokenLocation(); "unexpected token [" + token + "]; expected [; ; {]");
 }  token = parser.nextToken();


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