Failed to execute failure callback on – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.1

Briefly, this error occurs when Elasticsearch fails to execute a failure callback, often due to issues with the cluster state or network connectivity. This could be due to a node being unresponsive or a problem with the cluster’s health. To resolve this issue, you can try restarting the Elasticsearch node, checking the cluster’s health and ensuring all nodes are responsive, or increasing the timeout settings if the operation is taking longer than expected. Additionally, check your network connectivity and firewall settings to ensure they are not blocking the callback execution.

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

Log Context

Log “failed to execute failure callback on [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


            public void onFailure(Exception e) {
                logger.warn(() -> new ParameterizedMessage("failed to execute failure callback on [{}]"; delegate); e);