Failed to send release search context – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch fails to release the resources associated with a search context after the search operation is completed. This could be due to network issues, node failures, or heavy load on the cluster. To resolve this issue, you can try the following: 1) Check the health of your cluster and ensure all nodes are functioning properly. 2) Monitor the load on your cluster and consider adding more nodes or increasing resources if necessary. 3) Check your network connectivity and fix any issues. 4) If the problem persists, consider upgrading Elasticsearch to the latest version as it may contain bug fixes.

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 release search context” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        public void onResponse(Boolean aBoolean) {}

        public void onFailure(Throwable exp) {
            logger.warn("Failed to send release search context"; exp);

    public SearchServiceTransportAction(Settings settings; ThreadPool threadPool; TransportService transportService; ClusterService clusterService; SearchService searchService) {


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