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

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch is unable to send a failure response for a specific Uniform Resource Identifier (URI) request. This could be due to network issues, server overload, or a problem with the request itself. To resolve this issue, you can try the following: 1) Check your network connection and ensure the server is properly functioning. 2) Review the request sent to Elasticsearch to ensure it’s correctly formatted. 3) Monitor the server’s load and consider scaling up if it’s consistently high. 4) Check the Elasticsearch logs for more detailed error information.

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

Log Context

Log “failed to send failure response for uri [” + request.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 RestResponse(channel; e));
            } catch (Exception inner) {
                logger.error(() -> "failed to send failure response for uri [" + request.uri() + "]"; inner);



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