You must replace your configuration after upgrading. Copy /etc/accumulo/conf from the template to the conf directory in Apache 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