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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3612) NPE if the system can't determine its own name and you go DNS.getDefaultHost(null)
Date Fri, 20 Jun 2008 19:05:45 GMT
NPE if the system can't determine its own name and you go DNS.getDefaultHost(null)
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                 Key: HADOOP-3612
                 URL: https://issues.apache.org/jira/browse/HADOOP-3612
             Project: Hadoop Core
          Issue Type: Bug
    Affects Versions: 0.18.0
            Reporter: Steve Loughran
            Assignee: Steve Loughran
            Priority: Minor


In a test case that I am newly writing, on my infamous "home machine with broken DNS", I cant
call getByName(null) without seeing a stack trace:
Testcase: testNullInterface took 0.014 sec
	Caused an ERROR
null
java.lang.NullPointerException
	at java.net.NetworkInterface.getByName(NetworkInterface.java:226)
	at org.apache.hadoop.net.DNS.getIPs(DNS.java:94)
	at org.apache.hadoop.net.DNS.getHosts(DNS.java:141)
	at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:218)
	at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:235)
	at org.apache.hadoop.net.TestDNS.testNullInterface(TestDNS.java:62)

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