Delete warmer – How to solve related issues

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Delete warmer – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Delete warmer ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: admin, delete, indices and warmer.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log “[{}] delete warmer [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                         IndexWarmersMetaData warmers = indexMetaData.custom(IndexWarmersMetaData.TYPE);
                        if (warmers != null) {
                            for (IndexWarmersMetaData.Entry entry : warmers.entries()) {
                                for (String warmer : request.names()) {
                                    if (Regex.simpleMatch(warmer; || warmer.equals("_all")) {
                              "[{}] delete warmer [{}]"; index;;


Run the Check-Up to get a customized report like this:

Analyze your cluster