Ted Yu created YARN-3025:

             Summary: Provide API for retrieving blacklisted nodes
                 Key: YARN-3025
                 URL: https://issues.apache.org/jira/browse/YARN-3025
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Ted Yu

We have the following method which updates blacklist:
  public synchronized void updateBlacklist(List<String> blacklistAdditions,
      List<String> blacklistRemovals) {
Upon AM failover, there should be an API which returns the blacklisted nodes so 
that the new AM can make consistent decisions.
The new API can be:
  public synchronized List<String> getBlacklistedNodes()

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