Log Received a join request for an existing node – How To Solve Related Issues


Log Received a join request for an existing node – How To Solve Related Issues

Opster Team

Feb-20, Version: 1.7-8.0

 

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Received a join request for an existing node ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: discovery, join, node and request.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log context

Log “received a join request for an existing node [{}]” classname is ZenDiscovery.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             clusterService.submitStateUpdateTask("zen-disco-receive(join from node[" + node + "])"; Priority.IMMEDIATE; new ProcessedClusterStateUpdateTask() {
                
Override
                public ClusterState execute(ClusterState currentState) {
                    if (currentState.nodes().nodeExists(node.id())) {
                        // the node already exists in the cluster
                        logger.info("received a join request for an existing node [{}]"; node);
                        // still send a new cluster state; so it will be re published and possibly update the other node
                        return ClusterState.builder(currentState).build();
                    }
                    DiscoveryNodes.Builder builder = DiscoveryNodes.builder(currentState.nodes());
                    for (DiscoveryNode existingNode : currentState.nodes()) {



 

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