Failed to send response for search – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.3-1.3

Briefly, this error occurs when Elasticsearch is unable to send a response for a search request. This could be due to network issues, heavy load on the server, or a problem with the search query itself. To resolve this issue, you can try the following: 1) Check your network connection and ensure the Elasticsearch server is reachable. 2) Monitor the server’s load and resources, and scale up if necessary. 3) Review the search query for any errors or inefficiencies, and optimize it if possible. 4) Check the Elasticsearch logs for more detailed error information.

This log is related to search problems, in addition to reading the guide below you can use the free Search Log Analyzer. With Opster’s Analyzer, you can easily locate slow searches and understand what led to them adding additional load to your system. The tool is free and takes just 2 minutes to run.

Log Context

Log “Failed to send response for search” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                public void onFailure(Throwable e) {
                    try {
                    } catch (Exception e1) {
                        logger.warn("Failed to send response for search"; e1);


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