@Jay Kumar SenSharma In my case, when I experienced the error it was because my ambari database user did not have any privileges on the ambari database. (Postgresql 9.5) I added the ambari role to postgres role and it worked. ... View more

I verified the log file and got the following error message: 15 Feb 2017 19:23:32,044 ERROR [main] AmbariJpaLocalTxnInterceptor:180 - [DETAILED ERROR] Rollback reason: Local Exception Stack: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.6.2.v20151217-774c696): org.eclipse.persistence.exceptions.DatabaseException Internal Exception: org.postgresql.util.PSQLException: ERROR: could not read block 0 of relation base/16384/16567: read only 0 of 8192 bytes Error Code: 0 Call: SELECT cluster_id, current_cluster_state, current_stack_id FROM clusterstate WHERE (cluster_id = ?) bind => [1 parameter bound] Query: ReadObjectQuery(name="clusterStateEntity" referenceClass=ClusterStateEntity ) ... View more

@Manish Anand it could be that in trying to re-run the ambari-server install you inadvertantly corrupted the postgreSQL database that was part of the Sandbox. It makes more sense to blow this away and reimport the Sandbox image rather than try and troubleshoot the problem. ... View more