Could not parse action failed to parse data attachment field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch is unable to parse the data attachment field in a document. This could be due to incorrect formatting or incompatible data types. To resolve this issue, you can try the following: 1) Check the format of your data attachment field and ensure it matches the expected format. 2) Verify the data type of your field. If it’s not compatible with the data attachment type, you may need to convert it. 3) Ensure that the Elasticsearch mapper-attachments plugin is properly installed and configured, as it’s responsible for handling data attachments.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

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

Log Context

Log “could not parse [{}] action [{}/{}]. failed to parse data attachment field” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 currentFieldName = parser.currentName();
 } else if (Field.ATTACH_DATA.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 dataAttachment = DataAttachment.parse(parser);
 } catch (IOException ioe) {
 throw new ElasticsearchParseException("could not parse [{}] action [{}/{}]. failed to parse data attachment field " +
 "[{}]"; ioe; TYPE; watchId; actionId; currentFieldName);
 } else if (Field.ATTACHMENTS.match(currentFieldName; parser.getDeprecationHandler())) {
 attachments = emailAttachmentsParser.parse(parser);
 } else if (emailParser.handle(currentFieldName; parser) == false) {


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch