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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4311) Removing nodes from include and exclude lists will not remove them from decommissioned nodes list
Date Mon, 09 Nov 2015 22:12:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-4311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14997478#comment-14997478
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Jason Lowe commented on YARN-4311:
----------------------------------

Sorry, I couldn't find a reference to {{isUntracked}} in trunk nor in YARN-3223.  So not sure
if I understand exactly what is being asked.

To be consistent with HDFS the node should be gracefully decommissioned if it it appears in
the include and exclude list simultaneously, otherwise once it's removed from the include
list it's a hard decommission.

We could implement a "grace period" where nodes that were removed from the cluster are still
"tracked" in the UI for a while before being removed.  That may help with some of the potentially
confusing cases where a node is accidentally booted from the cluster.

> Removing nodes from include and exclude lists will not remove them from decommissioned
nodes list
> -------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4311
>                 URL: https://issues.apache.org/jira/browse/YARN-4311
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.6.1
>            Reporter: Kuhu Shukla
>            Assignee: Kuhu Shukla
>         Attachments: YARN-4311-v1.patch
>
>
> In order to fully forget about a node, removing the node from include and exclude list
is not sufficient. The RM lists it under Decomm-ed nodes. The tricky part that [~jlowe] pointed
out was the case when include lists are not used, in that case we don't want the nodes to
fall off if they are not active.



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