You must replace your configuration after upgrading. Copy /etc/accumulo/conf from the template to the conf directory in Accumulo hosts.
Start the services:
sudo su - l accumulo -c "/usr/hdp/current/accumulo-master/bin/start-server.sh `hostname` master" sudo su - l accumulo -c "/usr/hdp/current/accumulo-master/bin/start-server.sh `hostname` tserver" sudo su - l accumulo -c "/usr/hdp/current/accumulo-master/bin/start-server.sh `hostname` gc" sudo su - l accumulo -c "/usr/hdp/current/accumulo-master/bin/start-server.sh `hostname` tracer" sudo su - l accumulo -c "/usr/hdp/current/accumulo-master/bin/start-server.sh `hostname` monitor"
Check that the processes are running
ps -ef | grep accumulo
or visit http://<hostname>:50095 in your browser