How To Solve Issues Related to Log – Malformed external ping request; missing cluster-name element within request; from ; content

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Troubleshooting background

To troubleshoot Elasticsearch log “Malformed external ping request; missing cluster-name element within request; from ; content” it’s important to know common problems related to Elasticsearch concepts: discovery, discovery-multicast, ping, Plugin. See below-detailed explanations complete with common problems, examples and useful tips.

To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :



Log Context

Log ”Malformed external ping request; missing cluster-name element within request; from ; content” classname is
We have extracted the following from Elasticsearch source code to get an in-depth context :


            final String requestClusterName = request.containsKey("cluster_name") ? request.get("cluster_name").toString() : request.containsKey("clusterName") ? request.get("clusterName").toString() : null;
            if (requestClusterName == null) {
                logger.warn("malformed external ping request; missing 'cluster_name' element within request; from {}; content {}"; remoteAddress; externalPingData);

            if (!requestClusterName.equals(clusterName.value())) {
                logger.trace("got request for cluster_name {}; but our cluster_name is {}; from {}; content {}";

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