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https://issues.apache.org/jira/browse/HDFS-9762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15134438#comment-15134438
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Kihwal Lee commented on HDFS-9762:
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Once the precommit returns, I will move it to the common project.
> 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
> Attachments: HDFS-9762.001.patch, HDFS-9762.002.patch,
> HDFS-9762.003.patch
>
>
> 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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