[jira] [Work started] (HDFS-9762) NetworkTopologyWithNodeGroup.getNodeGroup() can loop infinitely for invalid 'loc' values

["Kuhu Shukla (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-9762?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HDFS-9762 started by Kuhu Shukla.
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> NetworkTopologyWithNodeGroup.getNodeGroup() can loop infinitely for invalid 'loc' values
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-9762
>                 URL: https://issues.apache.org/jira/browse/HDFS-9762
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.7.2
>            Reporter: Kuhu Shukla
>            Assignee: Kuhu Shukla
>            Priority: Minor
>
> Although the DatanodInfo/DataNodeDescriptor object tends to have a non-null, non-empty value for its network location, the getNodeGroup method does not handle the case if an empty or a null value is passed and can go on recursively causing StackOverflowError. This is an improvement to check for such a state and error out if the value is null and set the location to ROOT or empty string and if the original location is empty. 



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