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

Opster Team

Aug-23, Version: 1.2-2.9

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Briefly, this error occurs when OpenSearch fails to send a failure response for a specific Uniform Resource Identifier (URI). This could be due to network issues, incorrect URI syntax, or server-side problems. To resolve this, you can check your network connection and ensure it’s stable. Verify the URI syntax is correct and the server is properly configured to handle requests. If the problem persists, consider checking the server logs for more detailed error information. Also, ensure that the OpenSearch cluster has sufficient resources to handle the requests.

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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 OpenSearch concepts: response, rest.

Log Context

Log “failed to send failure response for uri [{}]” classname is
We extracted the following from OpenSearch 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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