Post-Upgrade Steps for Hadoop and YARN

Complete the following steps after you upgrade Hadoop and YARN with or without the Installer.

On each node, run configure.sh with the -R option. Include the -TL option if the timeline server is installed on the cluster. For example:
```
configure.sh -R -HS <hostname> -TL <hostname>
```
Optional: Transfer any custom configuration settings into the new default files in the configuration directory:
New configuration directory: /opt/mapr/hadoop/hadoop-<version>/etc/hadoop/

Backup configuration directory: /opt/mapr/hadoop/hadoop-<timestampversion>/etc/hadoop/

In the backup configuration directory, <timestampversion> is the version from packages that were installed before the upgrade. For example: 2.7.4.100.202101211026.