Could not parse email template unknown field field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch tries to parse an email template and encounters an unknown field. This could be due to a typo, incorrect syntax, or a field that doesn’t exist in the data source. To resolve this issue, you should first verify the field names in your email template. Ensure they match exactly with the field names in your data source. If the fields are correct, check the syntax of your template. Make sure you’re using the correct format for referencing fields. Lastly, ensure your data source contains the fields referenced in your template.

This guide will help you check for common problems that cause the log ” could not parse email template. unknown field [{}.{}] field ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, template.

Log Context

Log “could not parse email template. unknown field [{}.{}] field” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (Email.Field.BODY_TEXT.match(currentFieldName; parser.getDeprecationHandler())) {
 } else if (Email.Field.BODY_HTML.match(currentFieldName; parser.getDeprecationHandler())) {
 } else {
 throw new ElasticsearchParseException("could not parse email template. unknown field [{}.{}] field";
 fieldName; currentFieldName);
 } else {