4.2. Upgrade the Stack

Stop Ambari Server. On the Ambari Server host:
```
ambari-server stop
```
Update the stack version in the Server database, depending on if you are using a local repository:
Important
Make sure you delete the old MapReduce version before you run upgradestack.
```
ambari-server upgradestack HDP-2.0.6
```

Upgrade the HDP repository on all hosts and replace the old repo file with the new file:

	Important
	The file you download is named `hdp.repo`. To function properly in the system, it must be named `HDP.repo`. Once you have completed the "mv" of the new repo file to the repos.d folder, make sure there is no file named `hdp.repo` anywhere in your repos.d folder.

For RHEL/CentOS/Oracle Linux 5

wget  http://public-repo-1.hortonworks.com/HDP/centos5/2.x/updates/2.0.6.1/hdp.repo
mv hdp.repo /etc/yum.repos.d/HDP.repo

For RHEL/CentOS/Oracle Linux 6

wget http://public-repo-1.hortonworks.com/HDP/centos6/2.x/updates/2.0.6.1/hdp.repo 
mv hdp.repo /etc/yum.repos.d/HDP.repo

For SLES 11

wget  http://public-repo-1.hortonworks.com/HDP/suse11/2.x/updates/2.0.6.1/hdp.repo
mv hdp.repo /etc/zypp/repos.d/HDP.repo

Upgrade the stack on all Agent hosts. Skip any components your installation does not use:

For RHEL/CentOS/Oracle Linux
1. Remove remaining MapReduce components on all hosts:
```
yum erase hadoop-pipes hadoop-sbin hadoop-native
```
2. Upgrade the following components:
```
yum upgrade "collectd*" "epel-release*" "gccxml*" "pig*" "hadoop*" "sqoop*" "zookeeper*" "hbase*" "hive*" "hcatalog*" "webhcat-tar*" "oozie*" hdp_mon_nagios_addons
```
3. Check to see that the components in that list are upgraded.
```
yum list installed | grep HDP-$old-stack-version-number
```
  None of the components from that list should appear in the returned list.

For SLES

Remove remaining MapReduce components on all hosts:

zypper remove hadoop-pipes hadoop-sbin hadoop-native

Upgrade the following components:

zypper up "collectd*" "epel-release*" "gccxml*" "pig*" "hadoop*" "sqoop*" "zookeeper*" "hbase*" "hive*" "hcatalog*" "webhcat-tar*" "oozie*" hdp_mon_nagios_addons

To verify that components were upgraded, execute:

rpm -qa | grep hadoop, rpm -qa | grep hive and rpm -qa | grep hcatalog

If components were not upgraded, upgrade them as follows:
```
yast --update hadoop hcatalog hive
```

Legal notices

	Important
	Make sure you delete the old MapReduce version before you run `upgradestack`.