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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6359) NetworkTopology.chooseRandom(..) throws an IllegalArgumentException
Date Tue, 03 Nov 2009 20:17:32 GMT
NetworkTopology.chooseRandom(..) throws an IllegalArgumentException
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                 Key: HADOOP-6359
                 URL: https://issues.apache.org/jira/browse/HADOOP-6359
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Tsz Wo (Nicholas), SZE


When numOfDatanodes == 0, NetworkTopology.chooseRandom(..) throws an IllegalArgumentException.
{noformat}
2009-09-30 00:12:50,768 ERROR org.mortbay.log: /nn_browsedfscontent.jsp
java.lang.IllegalArgumentException: n must be positive
        at java.util.Random.nextInt(Random.java:250)
        at org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:536)
        at org.apache.hadoop.net.NetworkTopology.chooseRandom(NetworkTopology.java:504)
        ...
{noformat}

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