PublishResponseHandler failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.2-8.2

Briefly, this error occurs when Elasticsearch encounters an issue while trying to publish a response. This could be due to network issues, insufficient resources, or a problem with the Elasticsearch cluster itself. To resolve this issue, you can try the following: 1) Check the network connectivity and ensure that all nodes in the cluster are reachable. 2) Monitor the resource usage of your Elasticsearch cluster and scale it up if necessary. 3) Check the Elasticsearch logs for more detailed error messages that can help identify the root cause.

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

Log Context

Log “PublishResponseHandler: [{}] 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(new ParameterizedMessage("PublishResponseHandler: [{}] failed"; discoveryNode); e);
            return e;


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