YARN

Before starting the rollback procedure, make sure that HDFS and Zookeeper are rolled back.

1. Log in to the TIMELINE SERVICE V2.0 READER host.
2. Setup Kerberos Credentials in case of secured cluster. Locate the yarn-ats-hbase’s keytab and use kinit to cache the kerberos ticket.
   • kinit -kt path/to/yarn-ats.hbase-master.keytab yarn-ats-hbase/hostname@domain.
   • export JVMFLAGS="-Djava.security.auth.login.config=/etc/hadoop/conf/embedded-yarn-ats-hbase/yarn_hbase_master_jaas.conf"
3. Delete the atsv2-hbase-secure znode in the Zookeeper zookeeper-client -server ${zk_server_url} rmr /atsv2-hbase-secure.