org.apache.ambari.server.controller.spi.SystemException: Error loading deferred resources

[#1]

500 status codereceived on GET method for API: /api/v1/clusters/Sandbox/hosts?Hosts/host_name.in(sandbox.hortonworks.com)&fields=Hosts/public_host_name,host_components/HostRoles/component_name,host_components/metrics/hbase/master/IsActiveMaster&minimal_response=true

[#2]

i tried restarting but says...the Hbase master status shows stopped

[#3]

@Melvin Bandi without logs we cannot help. Also try importing a new Sandbox into your hypervisor if you don't have anything important. Sometimes it could just be a bad import.