Not enough nodes discovered to form a quorum in the initial configuration – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7-7.15

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Briefly, this error occurs when Elasticsearch cannot find enough nodes to form a quorum in the initial configuration. This is usually due to network issues, incorrect configuration, or nodes being down. To resolve this, ensure all nodes are up and running, check your network connectivity, and verify your cluster settings. If the issue persists, you may need to adjust the ‘discovery.zen.minimum_master_nodes’ setting in your Elasticsearch configuration to a lower value.

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This guide will help you check for common problems that cause the log ” not enough nodes discovered to form a quorum in the initial configuration ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster.

Log Context

Log “not enough nodes discovered to form a quorum in the initial configuration” class name is Coordinator.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 peerFinder.getFoundPeers().forEach(knownNodes::add);  if (votingConfiguration.hasQuorum(knownNodes.stream().map(DiscoveryNode::getId).collect(Collectors.toList())) == false) {
 logger.debug("skip setting initial configuration as not enough nodes discovered to form a quorum in the " +
 "initial configuration [knownNodes={}; {}]"; knownNodes; votingConfiguration);
 throw new CoordinationStateRejectedException("not enough nodes discovered to form a quorum in the initial configuration " +
 "[knownNodes=" + knownNodes + "; " + votingConfiguration + "]");
 }  logger.info("setting initial configuration to {}"; votingConfiguration);
 final CoordinationMetadata coordinationMetadata = CoordinationMetadata.builder(currentState.coordinationMetadata())

 

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