Exception root cause message is swallowed

    private void put(String key, File file, boolean copy) {
        try {
            File cached = DataStoreCacheUtils.getFile(key, cacheRoot);
            if (!cached.exists()) {
                if (copy) {
                    FileUtils.copyFile(file, cached);
                } else {
                    FileUtils.moveFile(file, cached);
                }
            }
            cache.put(key, cached);
        } catch (IOException e) {
            LOG.error("Exception adding id [{}] with file [{}] to cache", key, file);
        }
    }