Warm-up failed – How to solve related issues

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Warm-up failed – 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 ” Warm-up failed ” 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: index.

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 “Warm-up failed” classname is InternalEngine.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    } catch (Throwable t) {
                        // Don't fail a merge if the warm-up failed
                        if (isClosed.get() == false) {
                            logger.warn("Warm-up failed"; t);
                        if (t instanceof Error) {
                            // assertion/out-of-memory error; don't ignore those
                            throw (Error) t;


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

Analyze your cluster