An error occurred while reloading file %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.4-8.9

Briefly, this error occurs when Elasticsearch encounters an issue while reloading a specific file. This could be due to file corruption, incorrect file permissions, or the file being inaccessible. To resolve this, you can try the following: 1) Check the file’s integrity and ensure it’s not corrupted. 2) Verify the file permissions and make sure Elasticsearch has the necessary access. 3) Ensure the file’s location is accessible and the file is not being used by another process. 4) If the file is part of a plugin, consider reinstalling the plugin.

This guide will help you check for common problems that cause the log ” An error occurred while reloading file %s ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “An error occurred while reloading file %s” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        public void onFileChanged(Path file) {
            try {
            } catch (Exception e) {
                logger.warn(() -> format("An error occurred while reloading file %s"; file); e);



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