https://community.cloudera.com/t5/Support-Questions/ERROR-main-com-cloudera-server-cmf-Main-Server-failed/m-p/42654#M40474 <P>Late in answering though , the issue happenes because PostGRESql or any other database has not been set , and CDH server tries to look for default mysql database . To resolve it I followed below steps :</P><P>&nbsp;</P><P>1. Installed PostGRESql database following steps in this link : &nbsp;<A href="http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_embed_pstgrs.html#cmig_topic_5_7" target="_blank">http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_embed_pstgrs.html#cmig_topic_5_7</A></P><P>&nbsp;</P><P>2. The above link however assumes that you do not need to configure the database , but if you're following Path B , you still need to configure the database like an extenal PostGRESQl database instructions . To configure I followed steps in this link :</P><P><A href="http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_extrnl_pstgrs.html#cmig_topic_5_6_1" target="_blank">http://www.cloudera.com/documentation/enterprise/latest/topics/cm_ig_extrnl_pstgrs.html#cmig_topic_5_6_1</A></P><P>&nbsp;</P><P>3. Once it's configured then you run this command to initilize the parameters files :</P><P>&nbsp;</P><PRE>$ /usr/share/cmf/schema/scm_prepare_database.sh postgresql scm scm scm</PRE><P>&nbsp;</P><P>After this once you start the the server using command :</P><P>sudo service cloudera-scm-server start</P><P>&nbsp;</P><P>You should be able to open the cloudera manager server using URL&nbsp;http://&lt;host&gt;:7180 .</P><P>&nbsp;</P><P>Regards</P><P>Rahul</P> Wed, 06 Jul 2016 22:33:39 GMT singh101 2016-07-06T22:33:39Z