Master failure notification was rejected it s highly likely the node is shutting down – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.17

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Briefly, this error occurs when a node in Elasticsearch cluster is shutting down and it rejects the master failure notification. This could be due to network issues, heavy load, or a slow cluster. To resolve this, you can check the node’s logs for any shutdown signals. If the node is overloaded, consider optimizing your queries or adding more nodes to the cluster. If it’s a network issue, ensure stable connectivity between nodes. Also, ensure your cluster health is green and all nodes are properly connected.

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This guide will help you check for common problems that cause the log ” master failure notification was rejected; it’s highly likely the node is shutting down ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: master, node, discovery.

Log Context

Log “master failure notification was rejected; it’s highly likely the node is shutting down” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    for (Listener listener : listeners) {
                        listener.onMasterFailure(masterNode; cause; reason);
            } catch (EsRejectedExecutionException e) {
                logger.error("master failure notification was rejected; it's highly likely the node is shutting down"; e);
            stop("master failure; " + reason);


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