Join validation on cluster state – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7-7.11

Briefly, this error occurs when a node tries to join a cluster but fails the validation process. This could be due to mismatched versions, incompatible settings, or network issues. To resolve this, ensure all nodes have the same Elasticsearch version and compatible settings. Check your network connectivity and firewall settings to ensure nodes can communicate. If the problem persists, consider restarting the nodes or the entire cluster.

This guide will help you check for common problems that cause the log ” join validation on cluster state ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: join, cluster.

Log Context

Log “join validation on cluster state” class name is JoinHelper.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 ThreadPool.Names.GENERIC; ValidateJoinRequest::new;
 (request; channel; task) -> {
 final ClusterState localState = currentStateSupplier.get();
 if (localState.metadata().clusterUUIDCommitted() &&
 localState.metadata().clusterUUID().equals(request.getState().metadata().clusterUUID()) == false) {
 throw new CoordinationStateRejectedException("join validation on cluster state" +
 " with a different cluster uuid " + request.getState().metadata().clusterUUID() +
 " than local cluster uuid " + localState.metadata().clusterUUID() + "; rejecting");
 }
 joinValidators.forEach(action -> action.accept(transportService.getLocalNode(); request.getState()));
 channel.sendResponse(Empty.INSTANCE);

 

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