Failed to add InetSocketTransportAddress – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

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

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Failed to add InetSocketTransportAddress” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         try {
        } catch (Exception e) {
            logger.warn("Failed to add InetSocketTransportAddress"; e);

    public static synchronized void addAddressType(TransportAddress address) throws Exception {
        if (ADDRESS_REGISTRY.containsKey(address.uniqueAddressTypeId())) {


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