Downgrade each JournalNode process, one by one. The order does not matter.
Stop the JournalNode process, switch to the previous version, and start the process:
su - hdfs -c
"/usr/hdp/current/hadoop-hdfs-journalnode/../hadoop/sbin/hadoop-daemon.sh stop
journalnode"
hdp-select set hadoop-hdfs-journalnode 2.2.0.0-2041
/su - hdfs -c
"/usr/hdp/current/hadoop-hdfs-journalnode/../hadoop/sbin/hadoop-daemon.sh start
journalnode"
See Appendix A for HDFS validation tasks.
Continue with the next downgrade step.
