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From: "Steve Loughran (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (YARN-3025) Provide API for retrieving
 blacklisted nodes
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    [ https://issues.apache.org/jira/browse/YARN-3025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14272462#comment-14272462 ] 

Steve Loughran commented on YARN-3025:
--------------------------------------

Bikas, 
When our AM restarts, it loses all history of which nodes were unreliable. 

At least on restart, give us the list of last-preserved state.

> 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:
> {code}
>   public synchronized void updateBlacklist(List<String> blacklistAdditions,
>       List<String> blacklistRemovals) {
> {code}
> 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:
> {code}
>   public synchronized List<String> getBlacklistedNodes()
> {code}



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