config/src/main/java/com/alibaba/nacos/config/server/controller/v3/ConfigControllerV3.java [465:506]:
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        ZipUtils.ZipItem metaDataItem = unziped.getMetaDataItem();
        String metaData = metaDataItem.getItemData();
        Map<String, Object> failedData = new HashMap<>(4);
        
        ConfigMetadata configMetadata = YamlParserUtil.loadObject(metaData, ConfigMetadata.class);
        if (configMetadata == null || CollectionUtils.isEmpty(configMetadata.getMetadata())) {
            failedData.put("succCount", 0);
            return Result.failure(ErrorCode.METADATA_ILLEGAL, failedData);
        }
        List<ConfigMetadata.ConfigExportItem> configExportItems = configMetadata.getMetadata();
        // check config metadata
        for (ConfigMetadata.ConfigExportItem configExportItem : configExportItems) {
            if (StringUtils.isBlank(configExportItem.getDataId()) || StringUtils.isBlank(configExportItem.getGroup())
                    || StringUtils.isBlank(configExportItem.getType())) {
                failedData.put("succCount", 0);
                return Result.failure(ErrorCode.METADATA_ILLEGAL, failedData);
            }
        }
        
        List<ZipUtils.ZipItem> zipItemList = unziped.getZipItemList();
        Set<String> metaDataKeys = configExportItems.stream()
                .map(metaItem -> GroupKey.getKey(metaItem.getDataId(), metaItem.getGroup()))
                .collect(Collectors.toSet());
        
        Map<String, String> configContentMap = new HashMap<>(zipItemList.size());
        int itemNameLength = 2;
        zipItemList.forEach(item -> {
            String itemName = item.getItemName();
            String[] groupAdnDataId = itemName.split(Constants.CONFIG_EXPORT_ITEM_FILE_SEPARATOR);
            if (groupAdnDataId.length != itemNameLength) {
                Map<String, String> unrecognizedItem = new HashMap<>(2);
                unrecognizedItem.put("itemName", item.getItemName());
                unrecognizedList.add(unrecognizedItem);
                return;
            }
            
            String group = groupAdnDataId[0];
            String dataId = groupAdnDataId[1];
            String key = GroupKey.getKey(dataId, group);
            // metadata does not contain config file
            if (!metaDataKeys.contains(key)) {
                Map<String, String> unrecognizedItem = new HashMap<>(2);
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console/src/main/java/com/alibaba/nacos/console/handler/impl/inner/config/ConfigInnerHandler.java [326:367]:
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        ZipUtils.ZipItem metaDataItem = unziped.getMetaDataItem();
        String metaData = metaDataItem.getItemData();
        Map<String, Object> failedData = new HashMap<>(4);
        
        ConfigMetadata configMetadata = YamlParserUtil.loadObject(metaData, ConfigMetadata.class);
        if (configMetadata == null || CollectionUtils.isEmpty(configMetadata.getMetadata())) {
            failedData.put("succCount", 0);
            return Result.failure(ErrorCode.METADATA_ILLEGAL, failedData);
        }
        List<ConfigMetadata.ConfigExportItem> configExportItems = configMetadata.getMetadata();
        // check config metadata
        for (ConfigMetadata.ConfigExportItem configExportItem : configExportItems) {
            if (StringUtils.isBlank(configExportItem.getDataId()) || StringUtils.isBlank(configExportItem.getGroup())
                    || StringUtils.isBlank(configExportItem.getType())) {
                failedData.put("succCount", 0);
                return Result.failure(ErrorCode.METADATA_ILLEGAL, failedData);
            }
        }
        
        List<ZipUtils.ZipItem> zipItemList = unziped.getZipItemList();
        Set<String> metaDataKeys = configExportItems.stream()
                .map(metaItem -> GroupKey.getKey(metaItem.getDataId(), metaItem.getGroup()))
                .collect(Collectors.toSet());
        
        Map<String, String> configContentMap = new HashMap<>(zipItemList.size());
        int itemNameLength = 2;
        zipItemList.forEach(item -> {
            String itemName = item.getItemName();
            String[] groupAdnDataId = itemName.split(Constants.CONFIG_EXPORT_ITEM_FILE_SEPARATOR);
            if (groupAdnDataId.length != itemNameLength) {
                Map<String, String> unrecognizedItem = new HashMap<>(2);
                unrecognizedItem.put("itemName", item.getItemName());
                unrecognizedList.add(unrecognizedItem);
                return;
            }
            
            String group = groupAdnDataId[0];
            String dataId = groupAdnDataId[1];
            String key = GroupKey.getKey(dataId, group);
            // metadata does not contain config file
            if (!metaDataKeys.contains(key)) {
                Map<String, String> unrecognizedItem = new HashMap<>(2);
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