https://community.cloudera.com/t5/Support-Questions/unable-to-start-postgres-for-ambari/m-p/154320#M116776 <P style="margin-left: 40px;"> <A rel="user" href="https://community.cloudera.com/users/11295/slachterman.html" nodeid="11295">@slachterman</A> I check the pgstartup.log and see this:</P><P style="margin-left: 40px;">runuser: cannot set groups: Operation not permitted runuser: cannot set groups: Operation not permitted runuser: cannot set groups: Operation not permitted runuser: cannot set groups: Operation not permitted</P> Tue, 05 Jul 2016 11:29:52 GMT sunile_manjee 2016-07-05T11:29:52Z