[jira] [Created] (HDFS-14999) Avoid Potential Infinite Loop in DFSNetworkTopology

["Ayush Saxena (Jira)" <ji...@apache.org>]

Ayush Saxena created HDFS-14999:
-----------------------------------

             Summary: 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


{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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