Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.
To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.
This guide will help you check for common problems that cause the log ” Exception thrown by listener while notifying no longer master from ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cluster and master.
Log Context
Log “exception thrown by listener while notifying no longer master from [{}]” classname is InternalClusterService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
Override
public void onNoLongerMaster(String source) {
try {
listener.onNoLongerMaster(source);
} catch (Exception e) {
logger.error("exception thrown by listener while notifying no longer master from [{}]"; e; source);
}
}
Override
public void clusterStateProcessed(String source; ClusterState oldState; ClusterState newState) {
