Health check of failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.9-8.2

Briefly, this error occurs when Elasticsearch cannot perform a health check, which could be due to various reasons such as network issues, incorrect configuration, or the Elasticsearch service not running. To resolve this, you can check if the Elasticsearch service is running and restart it if necessary. Ensure the correct configuration settings are in place, particularly the cluster name and network settings. Also, check your network connectivity and firewall settings to ensure they are not blocking the health check.

This guide will help you check for common problems that cause the log ” health check of [{}] failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: monitor.

Log Context

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

                } catch (Exception ex) {
                    logger.error(new ParameterizedMessage("health check of [{}] failed"; path); ex);
                    if (currentUnhealthyPaths == null) {
                        currentUnhealthyPaths = new HashSet(1);


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