Failed to query node failure nodeId – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.9-8.9

Briefly, this error occurs when Elasticsearch is unable to communicate with a specific node in the cluster, identified by the nodeId. This could be due to network issues, the node being down, or the node being overloaded. To resolve this issue, you can check the status of the node and ensure it’s running properly. If it’s overloaded, consider adding more nodes to your cluster or optimizing your queries. If it’s a network issue, check your network configuration and connectivity.

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

Log Context

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

                if (response.hasFailures()) {
                    final String nodeIds = response.failures().stream().map(FailedNodeException::nodeId).collect(Collectors.joining(";"));
                    ElasticsearchException e = new ElasticsearchException("Failed to query nodes [" + nodeIds + "]");

                    for (FailedNodeException failure : response.failures()) {
                        logger.error("Failed to query node [" + failure.nodeId() + "]"; failure);



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