Failed node node getId – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.7-8.9

Briefly, this error occurs when Elasticsearch encounters an issue with a specific node, identified by its unique ID. The problem could be due to various reasons such as network connectivity issues, insufficient resources, or the node being unresponsive. To resolve this, you can try restarting the node, checking the node’s resource usage, or verifying the network connectivity. If the problem persists, consider checking the Elasticsearch logs for more detailed information about the error.

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

Log Context

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

 protected void onItemFailure(Map.Entry> entry; Exception e) {
 final var node = nodes.get(entry.getKey());
 final var shards = entry.getValue();
 logger.debug(() -> format("failed to execute [%s] on node [%s]"; actionName; node); e);  final var failedNodeException = new FailedNodeException(node.getId(); "Failed node [" + node.getId() + "]"; e);
 synchronized (this) {
 for (ShardRouting shard : shards) {
 exceptions.add(new DefaultShardOperationFailedException(shard.getIndexName(); shard.getId(); failedNodeException));


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