Failed to connect to node – How to solve related issues

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Failed to connect to node – 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 connect to node ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster and node.

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 connect to node [” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                try {
                } catch (Throwable e) {
                    // the fault detection will detect it as failed as well
                    logger.warn("failed to connect to node [" + node + "]"; e);

            // if we are the master; publish the new state to all nodes
            // we publish here before we send a notification to all the listeners; since if it fails


Run the free Check-Up to get customized insights on your system:

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