Failed to delete file – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

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Briefly, this error occurs when Elasticsearch tries to delete a file but fails due to reasons like insufficient permissions, the file being in use, or the file not existing. To resolve this, you can check if the file is currently being used by another process and stop it. Alternatively, verify the file’s existence and the permissions of the Elasticsearch process to ensure it has the necessary rights to delete the file. Lastly, ensure the file system is not read-only, as this would prevent file deletion.

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This guide will help you check for common problems that cause the log ” Failed to delete [” + file + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, delete, cache.

Log Context

Log “Failed to delete [” + file + “]” classname is CacheFile.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        assert assertNoPendingListeners();
        try {
            Files.deleteIfExists(file);
        } catch (IOException e) {
            // nothing to do but log failures here since closeInternal could be called from anywhere and must not throw
            logger.warn(() -> "Failed to delete [" + file + "]"; e);
        } finally {
            listener.onCacheFileDelete(CacheFile.this);
        }
    }
}

 

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