@Zhen Zeng To create an HDF cluster with Cloudbreak, a KDC must be configured, unless you have registered an LDAP in Cloudbreak and select that when creating the cluster. During cluster creation, did you use test a KDC or an existing KDC? For configuring Cloudbreak to create a cluster that uses a KDC, please refer to the Enable Kerberos documentation for Cloudbreak 2.7. For complete instructions to create an HDF cluster with Cloudbreak, please refer to the Cloudbreak 2.7 documentation for Creating HDF Clusters. ... View more