Upgrading Kudu

• Kudu 1.5 enables the optional ability to compute, store, and verify checksums on all pieces of data stored on a server by default. Due to storage format changes, downgrading to versions 1.3 or earlier is not supported and will result in an error.

• Spark 2.2 (and higher) requires Java 8 at runtime even though Kudu Spark 2.x integration is Java 7 compatible. Spark 2.2 is the default dependency version as of Kudu 1.5.0.

• The kudu-spark-tools module has been renamed to kudu-spark2-tools_2.11 in order to include the Spark and Scala base versions. This matches the pattern used in the kudu-spark module and artifacts.

• To improve security, world-readable Kerberos keytab files are no longer accepted by default. Set --allow_world_readable_credentials=true to override this behavior.

To use Cloudera Manager to upgrade Kudu using parcels or packages, use the following instructions. If you do not use Cloudera Manager, see Upgrade Kudu Using the Command Line.

If you use Cloudera Manager, do not use the following command-line instructions. See Upgrade Kudu using Cloudera Manager.

1. If you use a repository, re-download the repository list file to ensure that you have the latest information. See CDH Download Information for details.
2. Stop the Kudu master and tablet servers using the following commands:

   sudo service kudu-master stop 
   sudo service kudu-tserver stop

3. Depending on your operating system, issue the following set of commands on each Kudu host:

   Operating System	Upgrade Commands
   RHEL/CentOS	sudo yum -y clean all sudo yum -y upgrade kudu
   Ubuntu/Debian	sudo apt-get update sudo apt-get install kudu
   SLES	sudo zypper clean --all sudo zypper update kudu

4. Start the Kudu master and tablet servers using the following commands:

   $ sudo service kudu-master start
   $ sudo service kudu-tserver start