%s peers request failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.4-8.9

Briefly, this error occurs when Elasticsearch is unable to communicate with its peer nodes in a cluster due to network issues, misconfiguration, or if the peer nodes are down. To resolve this, you can check the network connectivity between the nodes, ensure that the nodes are up and running, and verify the cluster’s configuration settings. Also, check the Elasticsearch logs for more detailed error information. If the issue persists, consider restarting the Elasticsearch service on the affected nodes.

This guide will help you check for common problems that cause the log ” %s peers request failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery, request.

Log Context

Log “%s peers request failed” classname is PeerFinder.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


                public void handleException(TransportException exp) {
                    peersRequestInFlight = false;
                    logger.warn(() -> format("%s peers request failed"; Peer.this); exp);

                public String executor() {
                    return Names.CLUSTER_COORDINATION;


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