这是依赖库的版本信息
<curator.recipes.version>4.2.0</curator.recipes.version>
<zookeeper.version>3.4.10</zookeeper.version>
[dubbo-.3.1.6.txt](https://github.com/apache/dubbo/files/11177448/dubbo-.3.1.6.txt)
有没有大佬帮忙看下什么问题导致，万分感谢！！！
MetadataInfoStat metadataInfoStat = metadataInfos.get(revision);
        if (metadataInfoStat != null) {
            return metadataInfoStat.getMetadataInfo();
        } else {
            return null;
        }
    }
    @Override
    public MetadataInfo getRemoteMetadata(String revision, List<ServiceInstance> instances) {
        MetadataInfo metadata = metaCacheManager.get(revision);
        if (metadata != null && metadata != MetadataInfo.EMPTY) {
            metadata.init();
            
            if (logger.isDebugEnabled()) {
                logger.debug("MetadataInfo for revision=" + revision + ", " + metadata);
            }
            return metadata;
        }
        synchronized (metaCacheManager) {
            
            int triedTimes = 0;
            while (triedTimes < 3) {
                metadata = MetadataUtils.getRemoteMetadata(revision, instances, metadataReport);
                if (metadata != MetadataInfo.EMPTY) {
                    metadata.init();
                    break;
                } else {
                    if (triedTimes > 0) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("Retry the " + triedTimes + " times to get metadata for revision=" + revision);