Kuhu Shukla created HDFS-9762:
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Summary: 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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