Hi Yong , There are certain rpm dependencies in hawq 2.x and the same has to be met as a prerequisite for the installation .Please install required packages in the cluster and move forward with the installation . Following are the list of rpm prerequisite json-c =0.9"}">>=0.9 MIT rhel-6-server-eus-rpms Redhat HDB json support krb5-libs default MIT rhel-6-server-rpms Redhat HDB kerberos libicu default MIT and UCD and Public Domain rhel-6-server-rpms Redhat HDB unicode support openssl 0.9.8 OpenSSL rhel-6-server-rpms Redhat HDB security libgsasl default LGPLv2+ epel Fedora HDB security net-snmp-libs default BSD rhel-6-server-rpms Redhat HDB snmp Please let me know how it goes ! Thanks Pratheesh Nair ... View more