Unknown key for a ” + token + ” in – How to solve this Elasticsearch error

Average Read Time

2 Mins

Unknown key for a ” + token + ” in – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unknown key for a ” + token + ” in ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Unknown key for a ” + token + ” in [“classname  is SearchSourceBuilder.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (SCRIPT_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 script = Script.parse(parser);
 } else if (IGNORE_FAILURE_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 ignoreFailure = parser.booleanValue();
 } else {
 throw new ParsingException(parser.getTokenLocation(); "Unknown key for a " + token + " in [" + currentFieldName
 + "]."; parser.getTokenLocation());
 }
 } else if (token == XContentParser.Token.START_OBJECT) {
 if (SCRIPT_FIELD.match(currentFieldName; parser.getDeprecationHandler())) {
 script = Script.parse(parser);

 

Try AutoOps to detect and fix issues in your cluster:

Analyze Your Cluster

Skip to content