Failed to clean async result – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.9-8.2

Briefly, this error occurs when Elasticsearch is unable to clean up the results of an asynchronous operation due to issues like insufficient disk space, incorrect permissions, or internal server errors. To resolve this, you can try freeing up disk space, checking and correcting file and directory permissions, or restarting the Elasticsearch server. If the problem persists, consider checking the server logs for more detailed error information.

This guide will help you check for common problems that cause the log ” failed to clean async result [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to clean async result [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            // the index may not be there (no initial async search response stored yet?): we still want to return 200
            // note that index missing comes back as 200 hence it's handled in the onResponse callback
            if (status == RestStatus.NOT_FOUND && taskWasFound) {
            } else {
                logger.error(() -> new ParameterizedMessage("failed to clean async result [{}]"; taskId.getEncoded()); exc);
                listener.onFailure(new ResourceNotFoundException(taskId.getEncoded()));