Unable to parse component template – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.9-8

Briefly, this error occurs when Elasticsearch is unable to parse a component template due to incorrect syntax, missing fields, or invalid data types. To resolve this issue, you should first verify the JSON syntax of your template. Make sure all required fields are included and the data types match the expected ones. If the template references any fields or types that don’t exist, you’ll need to create them. Lastly, ensure that the template is compatible with your version of Elasticsearch.

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

Log Context

Log “unable to parse component template” class name is IndexTemplateRegistry.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } catch (Exception e) {
 throw new ElasticsearchParseException("unable to parse component template " + config.getTemplateName(); e);


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