Unable to parse – 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 Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error message may occur when Elasticsearch is unable to parse a document or field due to incorrect syntax or incompatible data types. This can occur when indexing data, querying an index, or during other operations. To resolve this issue, ensure that the data being indexed or queried is formatted correctly and that the correct data type is specified.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” unable to parse ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “unable to parse [“classname  is ManualTrigger.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

return builder.startObject().endObject();
 static ManualTrigger parse(XContentParser parser) throws IOException{
 if (parser.currentToken() != XContentParser.Token.START_OBJECT){
 throw new ElasticsearchParseException("unable to parse [" + ManualTriggerEngine.TYPE +
 "] trigger. expected a start object token; found [" + parser.currentToken() + "]");
 XContentParser.Token token = parser.nextToken();
 if (token != XContentParser.Token.END_OBJECT) {
 throw new ElasticsearchParseException("unable to parse [" + ManualTriggerEngine.TYPE +


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