Could not execute failure listener – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch fails to execute a failure listener, which is a callback function triggered when an operation fails. This could be due to a variety of reasons such as network issues, resource limitations, or bugs in the code. To resolve this issue, you can try the following: 1) Check the server’s network connectivity and stability. 2) Ensure that the server has sufficient resources (CPU, memory, disk space). 3) Review the code for any potential bugs or issues, especially around the failure listener. 4) Check the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” Could not execute failure listener: [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: client.

Log Context

Log “Could not execute failure listener: [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                public void onFailure(Throwable t) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Could not execute failure listener: [{}]"; t; t.getMessage());
                    } else {
                        logger.error("Could not execute failure listener: [{}]"; t.getMessage());


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