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https://issues.apache.org/jira/browse/HDFS-14999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108986#comment-17108986
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Vinayakumar B commented on HDFS-14999:
--------------------------------------

+1

> Avoid Potential Infinite Loop in DFSNetworkTopology
> ---------------------------------------------------
>
>                 Key: HDFS-14999
>                 URL: https://issues.apache.org/jira/browse/HDFS-14999
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ayush Saxena
>            Assignee: Ayush Saxena
>            Priority: Major
>         Attachments: HDFS-14999-01.patch
>
>
> {code:java}
>     do {
>       chosen = chooseRandomWithStorageTypeAndExcludeRoot(root, excludeRoot,
>           type);
>       if (excludedNodes == null || !excludedNodes.contains(chosen)) {
>         break;
>       } else {
>         LOG.debug("Node {} is excluded, continuing.", chosen);
>       }
>     } while (true);
> {code}
> Observed this loop getting stuck as part of testing HDFS-14913.
> There should be some exit condition or max retries here



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