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https://issues.apache.org/jira/browse/NET-452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226669#comment-13226669
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Eli Collins commented on NET-452:
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This jira just needs to be moved back to Hadoop Common.
> NetworkTopology::getLeaf should check for invalid topologies
> ------------------------------------------------------------
>
> Key: NET-452
> URL: https://issues.apache.org/jira/browse/NET-452
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 1.0
> Reporter: Colin Patrick McCabe
> Fix For: 1.0
>
> Attachments: HDFS-3073.002.patch
>
>
> Currently, NetworkTopology::getLeaf doesn't do too much validation on the
> NetworkTopology object itself. This results in us getting ClassCastException
> sometimes when the topology is invalid. We should have a less confusing
> exception message for this case.
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