Error while sending ping response – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.17

Briefly, this error occurs when Elasticsearch nodes are unable to communicate with each other due to network issues, firewall restrictions, or incorrect configuration. To resolve this, ensure that all nodes are running and network connectivity is stable. Check firewall settings to allow communication between nodes. Also, verify the cluster settings in the Elasticsearch configuration file, particularly the ‘’ parameter, which should list all nodes in the cluster.

This guide will help you check for common problems that cause the log ” error while sending ping response ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response, discovery, ping.

Log Context

Log “error while sending ping response” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                        try {
                        } catch (IOException inner) {
                            logger.warn("error while sending ping response"; inner);

                    public void clusterStateProcessed(String source; ClusterState oldState; ClusterState newState) {


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