[HADOOP-697] Duplicate data node name calculation in Datanode constructor

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Assignee: Raghu Angadi
• Reporter: Hairong Kuang
• Created: 08/Nov/06 22:26
• Updated: 08/Jul/09 16:42
• Resolved: 20/Mar/07 23:04

Description

A data node name is calculated twice when a DataNode object is constructed. One is computed at line 158 in DataNode.java using the statement:

InetAddress.getLocalHost().getHostName().

The value is passed the private DataNode constructor but is never used. The name is recomputed at lines 189-192 using the statement:

DNS.getDefaultHost(
conf.get("dfs.datanode.dns.interface", "default"),
conf.get("dfs.datanode.dns.nameserver", "default"))".

Issue Links

• is part of: HADOOP-985 Namenode should identify DataNodes as ip:port instead of hostname:port