Failed to finalize ping – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch nodes fail to communicate with each other during the discovery phase. This could be due to network issues, incorrect configuration, or firewall restrictions. To resolve this, ensure that all nodes are correctly configured and can reach each other. Check your network settings and firewall rules. Also, verify that the discovery settings in your Elasticsearch configuration are correct. If the issue persists, consider increasing the ping timeout value.

This guide will help you check for common problems that cause the log ” [{}] failed to finalize ping ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery, discovery-multicast, ping and Plugin.

Log Context

Log “[{}] failed to finalize ping” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

logger.trace("[{}] sending last pings"; id);
                            threadPool.schedule(TimeValue.timeValueMillis(timeout.millis() / 4); ThreadPool.Names.GENERIC; new AbstractRunnable() {
                                public void onFailure(Throwable t) {
                                    logger.warn("[{}] failed to finalize ping"; t; id);

                                protected void doRun() throws Exception {
                                    finalizePingCycle(id; listener);


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