Context array must have string number or boolean values but was token – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1.2-2.9

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Briefly, this error occurs when OpenSearch encounters a data type in the context array that it doesn’t expect. OpenSearch expects string, number, or boolean values, but it has found a different data type, referred to as a ‘token’. To resolve this issue, you should check the data you’re sending to OpenSearch and ensure that all values in the context array are of the correct type. If you’re using a programming language to send data, ensure that it’s correctly converting data types before sending them to OpenSearch.

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This guide will help you check for common problems that cause the log ” context array must have string; number or boolean values; but was [” + token + “] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: search.

Log Context

Log “context array must have string; number or boolean values; but was [” + token + “]” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 } else if (token == Token.START_ARRAY) {
 while ((token = parser.nextToken()) != Token.END_ARRAY) {
 if (token == Token.VALUE_STRING || token == Token.VALUE_NUMBER || token == Token.VALUE_BOOLEAN) {
 } else {
 throw new OpenSearchParseException("context array must have string; number or boolean values; but was [" + token + "]");
 } else {
 throw new OpenSearchParseException(
 "contexts must be a string; number or boolean or a list of string; number or boolean; but was [" + token + "]"


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