Failed to connect to seed node – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.4-7.8

Briefly, this error occurs when Elasticsearch is unable to establish a connection with the seed node. This could be due to network issues, incorrect configuration of the seed node, or the seed node being down. To resolve this issue, you can check the network connectivity, verify the seed node’s configuration, or ensure the seed node is up and running. If the seed node is part of a cluster, ensure that the cluster health is good and all nodes are properly connected.

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

Log Context

Log “failed to connect to seed node [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } else {
            }; e -> {
                final Transport.Connection connection = openConnectionStep.result();
                logger.warn(new ParameterizedMessage("failed to connect to seed node [{}]"; connection.getNode()); e);

            fullConnectionStep.whenComplete(aVoid -> {


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