Node name node ID – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-6.8

Briefly, this error occurs when Elasticsearch cannot identify the node due to a missing or incorrect node ID. The node ID is crucial for cluster coordination and data allocation. To resolve this issue, you can check the elasticsearch.yml configuration file to ensure the node ID is correctly set. If the node ID is missing, you should add it. If it’s incorrect, correct it. Also, ensure that the node is properly connected to the cluster. If the problem persists, restarting the Elasticsearch service might help.

This guide will help you check for common problems that cause the log ” node name [{}]; node ID [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: node.

Log Context

Log “node name [{}]; node ID [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            } catch (IOException ex) {
                throw new IllegalStateException("Failed to create node environment"; ex);
            if (nodeNameExplicitlyDefined) {
      "node name [{}]; node ID [{}]";
                        NODE_NAME_SETTING.get(tmpSettings); nodeEnvironment.nodeId());
            } else {
                tmpSettings = Settings.builder()
                        .put(NODE_NAME_SETTING.getKey(); nodeIdToNodeName(nodeEnvironment.nodeId()))