[jira] [Created] (HDFS-10208) Addendum for HDFS-9579: to handle the case when client machine can't resolve network path

["Ming Ma (JIRA)" <ji...@apache.org>]

Ming Ma created HDFS-10208:
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             Summary: Addendum for HDFS-9579: to handle the case when client machine can't resolve network path
                 Key: HDFS-10208
                 URL: https://issues.apache.org/jira/browse/HDFS-10208
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ming Ma


If DFSClient runs on a machine that can't resolve network path, e.g.{{dnsToSwitchMapping.resolve}} returns null, that will cause exception when it tries to create {{clientNode}}. In such case, there is no need to create {{clientNode}} as null {{clientNode}} means its network distance with any datanode is Integer.MAX_VALUE, which is what we want.

{noformat}
    clientNode = new NodeBase(clientHostName,
        dnsToSwitchMapping.resolve(nodes).get(0));
{noformat}



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