Before you begin reading this guide, we recommend you run 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 ” Value for setting is too low. This can result in data loss! Please set it to at least a quorum of master- ” 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-azure-classic and elect.
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 “Value for setting {} is too low. This can result in data loss! Please set it to at least a quorum of master-” classname is ElectMasterService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
}
public void logMinimumMasterNodesWarningIfNecessary(ClusterState oldState; ClusterState newState) {
// check if min_master_nodes setting is too low and log warning
if (hasTooManyMasterNodes(oldState.nodes()) == false && hasTooManyMasterNodes(newState.nodes())) {
logger.warn("value for setting \"{}\"" is too low. This can result in data loss! Please set it to at least a quorum of master-"" +
