Failed to send failure response for uri – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.16-8.2

Briefly, this error occurs when Elasticsearch is unable to send a failure response for a specific Uniform Resource Identifier (URI). This could be due to network issues, incorrect URI, or server overload. To resolve this, you can check your network connection, verify the URI, or reduce the server load by optimizing your queries or increasing your server capacity. Additionally, ensure that your Elasticsearch version is up-to-date and compatible with your system.

This guide will help you check for common problems that cause the log ” failed to send failure response for uri [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response, rest.

Log Context

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

        } catch (Exception e) {
            try {
                channel.sendResponse(new BytesRestResponse(channel; e));
            } catch (Exception inner) {
                logger.error(() -> new ParameterizedMessage("failed to send failure response for uri [{}]"; request.uri()); inner);



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