No nodes to set nodes will be updated at the next sniffing round – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch cannot find any nodes to update during a sniffing round. Sniffing is a process where the client checks for alive nodes in the cluster. This could be due to network issues, incorrect configuration, or all nodes being down. To resolve this, ensure that your nodes are up and running, check your network connectivity, and verify your Elasticsearch configuration, particularly the settings related to node discovery and sniffing.

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This guide will help you check for common problems that cause the log ” no nodes to set; nodes will be updated at the next sniffing round ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: client.

Log Context

Log “no nodes to set; nodes will be updated at the next sniffing round” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        List sniffedNodes = nodesSniffer.sniff();
        if (logger.isDebugEnabled()) {
            logger.debug("sniffed nodes: " + sniffedNodes);
        if (sniffedNodes.isEmpty()) {
            logger.warn("no nodes to set; nodes will be updated at the next sniffing round");
        } else {


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