10. Upgrade Apache WebHCat (Templeton)

Install Apache WebHCat.
- For RHEL/CentOS:
```
yum install hive-webhcat webhcat-tar-hive webhcat-tar-pig
```
- For SLES:
  Run the following command:
```
zypper install hive-webhcat webhcat-tar-hive webhcat-tar-pig
```
- For Ubuntu or Debian:
```
apt-get install webhcat-tar-hive webhcat-tar-pig 
```
Also see the instructions on manually deploying the WebHCat instance provided here.
Copy the appropriate configurations from /etc/hcatalog/conf to /etc/hive-webhcat/conf/.

Copy the new Pig, Hive and Hadoop-streaming jars to HDFS using the path you specified in ./etc/hive-webhcat/conf/ and change ownership to the hcat user with 755 permissions. For example:

hdfs dfs-copyFromLocal /usr/share/HDP-webhcat/hive.tar.gz /usr/share/HDP-webhcat/pig.tar.gz
/usr/lib/hadoop-mapreduce/hadoop-streaming.jar hdfs:///apps/webhcat/. 
hdfs dfs -chmod -R 755 hdfs:///apps/webhcat/* 
hdfs dfs -chown -R hcat hdfs:///apps/webhcat/*

Replace your WebHCat configuration after upgrading. Copy your modified/etc/webhcat/conf from the template to the configuration directory in all your WebHCat hosts.

Start WebHCat:

sudo su -l $WEBHCAT_USER -c "/usr/lib/hive-hcatalog/sbin/webhcat_server.sh start"

Smoke test WebHCat. On the WebHCat host machine, execute the following command:

 http://$WEBHCAT_HOST_MACHINE:50111/templeton/v1/status

If you are using a secure cluster, excecute the following command:

curl --negotiate -u:  http://cluster.$PRINCIPAL.$REALM:50111/templeton/v1/status
{"status":"ok","version":"v1"}[machine@acme]$

Remove shared libraries from old Templeton installation. On the WebHCat host machine, execute the following command:
```
sudo su -l $HDFS_USER -c "hadoop dfs -rmr -skipTrash /apps/templeton"
rm -rf /usr/share/HDP-templeton 
```
where
- $WEBHCAT_USER is the WebHCat Service user. For example, hcat.
- $HDFS_USER is the HDFS Service user. For example, hdfs.

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