Update 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 analyzes 2 JSON files to detect many errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Update warmer ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: admin, indices and warmer.

Log Context

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

                                if (!found) {
                                    logger.info("[{}] put warmer [{}]"; index; request.name());
                                    entries.add(new IndexWarmersMetaData.Entry(request.name(); request.searchRequest().types(); request.searchRequest().queryCache(); source));
                                } else {
                                    logger.info("[{}] update warmer [{}]"; index; request.name());
                                warmers = new IndexWarmersMetaData(entries.toArray(new IndexWarmersMetaData.Entry[entries.size()]));
                            IndexMetaData.Builder indexBuilder = IndexMetaData.builder(indexMetaData).putCustom(IndexWarmersMetaData.TYPE; warmers);


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