[jira] [Commented] (MAPREDUCE-4599) Ensure not to launch container on blacklisted nodes

["Siddharth Seth (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13443504#comment-13443504 ] 

Siddharth Seth commented on MAPREDUCE-4599:
-------------------------------------------

Couple of comments
- removeFromBlackList(nodeId) -> un-blacklisting of nodes is currently not supported. Adding support for this (along with a criteria) should not be part of the MR-3902 effort.
- the event type "N_NODE_WAS_BLACKLISTED" needs to be generated in AMNodeImpl when the node enters a BLACKLISTED state.
                
> Ensure not to launch container on blacklisted nodes
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-4599
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4599
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: applicationmaster
>    Affects Versions: MR-3902
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>            Priority: Minor
>         Attachments: MAPREDUCE-4599.patch
>
>
> The current implementation of RMContainerAllocator doesn't ensure not to launch containers on blacklisted nodes. This may cause some skews by tasks on bad nodes.

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