PublishResponseHandler discoveryNode failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch encounters an issue while trying to publish a cluster state to other nodes in the cluster. This could be due to network issues, node failures, or configuration problems. To resolve this, you can check the network connectivity between nodes, ensure all nodes are running and properly configured, and check the Elasticsearch logs for more detailed error information. Additionally, you may need to adjust the discovery settings or increase the timeout settings in your Elasticsearch configuration.

This guide will help you check for common problems that cause the log ” PublishResponseHandler: [” + discoveryNode + “] failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery, cluster, response, node.

Log Context

Log “PublishResponseHandler: [” + discoveryNode + “] failed” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            if (e instanceof final TransportException transportException) {
                if (transportException.getRootCause() instanceof final Exception rootCause) {
                    return rootCause;
                } else {
                    assert false : e;
                    logger.error(() -> "PublishResponseHandler: [" + discoveryNode + "] failed"; e);
            return e;


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