Failed to add InetSocketTransportAddress – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch is unable to add a new node to the cluster due to network connectivity issues, incorrect IP address or port, or firewall restrictions. To resolve this, ensure the IP address and port are correct and reachable. Check your network connectivity and firewall settings. If the problem persists, consider restarting the Elasticsearch service or the entire cluster.

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.

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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