Failed node ” + nodeId + ” – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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

Log Context

Log “Failed node [” + nodeId + “]”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

private void onFailure(int idx; String nodeId; Throwable t) {
 if (logger.isDebugEnabled() && !(t instanceof NodeShouldNotConnectException)) {
 logger.debug(new ParameterizedMessage("failed to execute on node [{}]"; nodeId); t);
 responses.set(idx; new FailedNodeException(nodeId; "Failed node [" + nodeId + "]"; t)); 
 if (counter.incrementAndGet() == responses.length()) {


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