Failed node discoveryNode getId – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.9-8.9

Briefly, this error occurs when Elasticsearch is unable to communicate with a node in the cluster, identified by the ID in the error message. This could be due to network issues, the node being down, or configuration problems. To resolve this, you can check the network connectivity, ensure the node is running and properly configured, and check the Elasticsearch logs for more detailed error information. If the node is permanently lost, consider removing it from the cluster configuration.

This guide will help you check for common problems that cause the log ” Failed node [” + discoveryNode.getId() + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: node, discovery.

Log Context

Log “Failed node [” + discoveryNode.getId() + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 protected void onItemFailure(DiscoveryNode discoveryNode; Exception e) {
 logger.debug(() -> format("failed to execute [%s] on node [%s]"; actionName; discoveryNode); e);
 synchronized (exceptions) {
 exceptions.add(new FailedNodeException(discoveryNode.getId(); "Failed node [" + discoveryNode.getId() + "]"; e));
 }  @Override
 protected CheckedConsumer; Exception> onCompletion() {


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