Upgrading Impala

This section describes how to upgrade Impala without the Installer.

Upgrade the mapr-impala package on all Impala nodes in the cluster:
```
$ sudo yum update mapr-impala
```
In /opt/mapr/impala/impala-<version>/conf/env.sh, complete the following steps:
1. Verify that the Statestore address is set to the address where you plan to run the statestore service.
```
IMPALA_STATE_STORE_HOST=<IP address hosting statestore>
```
2. Change the Catalog service address to the address where you plan to run the catalog service.
```
CATALOG_SERVICE_HOST=<IP address hosting catalog service>
```
  Refer to Additional Impala Configuration Options for a list of other options that you can modify in env.sh.

Verify that hive-site.xml has the following property configured on all nodes:

<property>
    <name>hive.metastore.uris</name>
    <value>thrift://<metastore_server_host>:9083</value>
</property>

To upgrade the statestore service, issue the following command:
```
$ sudo yum update mapr-impala-statestore
```
To upgrade the catalog service, issue the following command:
```
$ sudo yum update mapr-impala-catalog
```
Note: It is recommended (not required) that you install the catalog service on the same node as the statestore service.
To upgrade the impala server, issue the following command:
```
$ sudo yum update mapr-impala-server
```
Run configure.sh to refresh the node configuration.
```
/opt/mapr/server/configure.sh -R
```