An error occurred while closing the internal client – 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 encounters an issue while trying to close an internal client. This could be due to a network issue, a problem with the client itself, or a server-side error. To resolve this issue, you could try restarting Elasticsearch, checking the network connection, or investigating the server logs for more detailed error information. If the problem persists, you may need to debug the client or even consider upgrading Elasticsearch to the latest version, as the issue might be a bug that has been fixed in a newer release.

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This guide will help you check for common problems that cause the log ” an error occurred while closing the internal client ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, client.

Log Context

Log “an error occurred while closing the internal client” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            logger.error("an error occurred while closing the internal client sniffer"; e);
        } finally {
            try {
            } catch (Exception e) {
                logger.error("an error occurred while closing the internal client"; e);

    public static List> getDynamicSettings() {


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