If you use the HBase REST server, follow these steps. Otherwise, continue with the next step in the upgrade process.

The HBase REST server does not support rolling downgrade; you can’t keep it running as you downgrade. To downgrade the REST server, stop and start the process:

su - hbase -c "/usr/hdp/current/hbase-master/bin/hbase-daemon.sh stop rest"

su - hbase -c "/usr/hdp/current/hbase-master/bin/hbase-daemon.sh start rest --infoport <port>"

(for example, port 8085)

When finished, verify that the REST server accepts traffic. 17000 is the default port for REST:

REST-gateway:17000/version

Continue with the next downgrade step.