Unexpected error while finishing pinging round – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.17

Briefly, this error occurs when Elasticsearch encounters an issue during the pinging process, which is used to check the status of nodes in a cluster. This could be due to network issues, overloaded nodes, or configuration errors. To resolve this, you can check the network connectivity between nodes, ensure nodes are not overloaded by monitoring their usage, and verify the cluster settings in the Elasticsearch configuration file. Additionally, checking the Elasticsearch logs can provide more detailed information about the error.

This guide will help you check for common problems that cause the log ” unexpected error while finishing pinging round ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery.

Log Context

Log “unexpected error while finishing pinging round” classname is UnicastZenPing.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


            public void onFailure(Exception e) {
                logger.warn("unexpected error while finishing pinging round"; e);
        }; scheduleDuration; ThreadPool.Names.GENERIC);

    // for testing


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