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！！！
}
        this.serviceInstance = createServiceInstance(this.metadataInfo);
        if (!isValidInstance(this.serviceInstance)) {
            logger.warn(REGISTRY_FAILED_FETCH_INSTANCE, "", "", "No valid instance found, stop registering instance address to registry.");
            return;
        }
        boolean revisionUpdated = calOrUpdateInstanceRevision(this.serviceInstance);
        if (revisionUpdated) {
            reportMetadata(this.metadataInfo);
            doRegister(this.serviceInstance);
        }
    }
    /**
     * Update assumes that DefaultServiceInstance and its attributes will never get updated once created.
     * Checking hasExportedServices() before registration guarantees that at least one service is ready for creating the
     * instance.
     */
    @Override
    public synchronized void update() throws RuntimeException {
        if (isDestroy) {
            return;
        }
        if (this.serviceInstance == null) {
            this.serviceInstance = createServiceInstance(this.metadataInfo);
        } else if (!isValidInstance(this.serviceInstance)) {
            ServiceInstanceMetadataUtils.customizeInstance(this.serviceInstance, this.applicationModel);
        }
        if (!isValidInstance(this.serviceInstance)) {
            return;
        }