Empty template id found and dropped – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8-8.9

Briefly, this error occurs when Elasticsearch encounters an empty template ID during its operations. This could be due to a configuration error or a bug in the system. To resolve this issue, you can check your Elasticsearch configuration to ensure that all template IDs are correctly defined. If the problem persists, consider updating your Elasticsearch version or contacting support for further assistance. Additionally, ensure that your data input does not contain empty template IDs.

This guide will help you check for common problems that cause the log ” empty template [” + id + “] found and dropped ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: template.

Log Context

Log “empty template [” + id + “] found and dropped” classname is ScriptMetadata.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    // as of 8.0 we drop scripts/templates with an empty source
                    // this check should be removed for the next upgradable version after 8.0
                    // since there is a guarantee no more empty scripts will exist
                    if (source.getSource().isEmpty()) {
                        if (Script.DEFAULT_TEMPLATE_LANG.equals(source.getLang())) {
                            logger.warn("empty template [" + id + "] found and dropped");
                        } else {
                            logger.warn("empty script [" + id + "] found and dropped");
                    } else {
                        scripts.put(id; source);


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