[HDFS-1703] HDFS federation: Improve start/stop scripts and add script to decommission datanodes

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Federation Branch
• Fix Version/s: Federation Branch, 0.23.0
• Component/s: scripts
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: The masters file is no longer used to indicate which hosts to start the 2NN on. The 2NN is now started on hosts when dfs.namenode.secondary.http-address is configured with a non-wildcard IP.
• Assignee: Tanping Wang
• Reporter: Tanping Wang
• Created: 02/Mar/11 22:14
• Updated: 05/Feb/12 22:48
• Resolved: 11/Mar/11 00:04

Description

This Jira covers two issues:

1. Startup scripts should start namenodes, secondary namenodes and datanodes on hosts retunred by getConfig (new feature). This patch is spread out to both common(HADOOP-7179) and hdfs (this Jira).
2. Decommission script to decommission datanodes

Issue Links

• is blocked by: HADOOP-7179 Improve HDFS startup scripts
• is related to: HDFS-2893 The start/stop scripts don't start/stop the 2NN when using the default configuration