Duplicate data node name calculation in Datanode constructor
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Key: HADOOP-697
URL: http://issues.apache.org/jira/browse/HADOOP-697
Project: Hadoop
Issue Type: Improvement
Components: dfs
Affects Versions: 0.8.0
Reporter: Hairong Kuang
Assigned To: Hairong Kuang
Fix For: 0.8.1
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"))".
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