Briefly, this error occurs when Elasticsearch is unable to parse dynamic attachments due to incorrect formatting or unsupported file types. This could be due to a missing or incorrect mapper-attachments plugin. To resolve this issue, ensure that the mapper-attachments plugin is correctly installed and updated. Also, check the format of the attachments being parsed. They should be base64 encoded and of a supported file type. Lastly, verify the structure of your JSON document, ensuring that the field containing the attachment is correctly formatted.
This guide will help you check for common problems that cause the log ” could not parse dynamic attachments. failed to parse [{}] 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 dynamic attachments. failed to parse [{}] field” class name is DynamicAttachments.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
}
} else if (XField.TEMPLATE.match(currentFieldName; parser.getDeprecationHandler())) {
try {
template = Attachment.Template.parse(parser);
} catch (ElasticsearchParseException pe) {
throw new ElasticsearchParseException("could not parse dynamic attachments. failed to parse [{}] field"; pe;
XField.TEMPLATE.getPreferredName());
}
} else {
throw new ElasticsearchParseException("could not parse dynamic attachments. unexpected field [{}]"; currentFieldName);
}
