This document summarizes the new features in Ambari 1.5.0, including maintenance mode to silence alerts during maintenance, rolling restarts to minimize downtime during component restarts, bulk operations to perform actions across multiple hosts simultaneously, customizable ZooKeeper configurations, and setting a default JDK of 7.

1. © Hortonworks Inc. 2014
Apache Ambari
1.5.0
April 2014
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What’s New in Ambari 1.5.0?
• Maintenance Mode
• Rolling Restarts
• Bulk Host Operations
• Service and Component Restarts
• Decommission TTs, NMs, RSs
• Add Service
• Customize ZooKeeper Configs
• Refresh Client Configs
• Default JDK 7
• For a complete list of changes:
https://issues.apache.org/jira/browse/AMBARI/fixforversion/12325019
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Maintenance Mode
• Goal: silence alerts for services, hosts and components when
performing maintenance
• Ability to put Service or Host “Out of Service”
• Alerts will be suspended for that item
• Item will not respond to bulk operations (such as restarts)
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Rolling Restarts
• Goal: minimize cluster downtime + service impact when making
changes across many hosts
• Ability to initiate a "rolling restart" of components
• Optionally include only hosts with configurations changes
• Set host batch size + time to wait between batches
• Set failure tolerance to halt restarts automatically
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Bulk Host Operations
• Perform host operations such as
Stop, Start, Restart, Decommission, Maintenance
Mode in “bulk” form
• Apply operations to all hosts, filtered hosts or a
selected group of hosts
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Restarts
• Explicit “Restart” operation
• For Components, Hosts and Services
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Components Hosts Services
Restart individual components at
the host level.
Restart all components on a
given host.
Restart all components of a
given service.

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Decommission
• TaskTrackers (HDP 1.3)
• NodeManagers (HDP 2.0 and 2.1)
• RegionServers (HDP 1.3, 2.0 and 2.1)
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Customizable ZooKeeper Configs
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Refresh Client Configs
• Ability to refresh client configurations on a host
• Useful for client-only hosts
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Default JDK 7
• Select JDK during setup
–Will match JCE + JDK to selected JDK version
• Custom JDK option
–You must match JCE to the custom JDK
–Use Custom JDK if you want to use OpenJDK or in the case of a
local install (no internet access)
• Change JDK by re-running setup
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Other Changes
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Operation Log Locations “About Ambari” Dialog w/ Version
Operation Timing Info

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Learn More
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Resource Location
Apache Ambari Project Page http://ambari.apache.org
Ambari Project Wiki https://cwiki.apache.org/confluence/display/AMBARI
Ambari Project JIRA https://issues.apache.org/jira/browse/AMBARI