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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7076) Implement container release to support dynamic scaling
Date Fri, 03 Nov 2017 15:28:06 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16237745#comment-16237745
] 

ASF GitHub Bot commented on FLINK-7076:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4729#discussion_r148807573
  
    --- Diff: flink-yarn/src/main/java/org/apache/flink/yarn/YarnResourceManager.java ---
    @@ -63,11 +64,14 @@
      * The yarn implementation of the resource manager. Used when the system is started
      * via the resource framework YARN.
      */
    -public class YarnResourceManager extends ResourceManager<ResourceID> implements
AMRMClientAsync.CallbackHandler {
    +public class YarnResourceManager extends ResourceManager<YarnWorkerNode> implements
AMRMClientAsync.CallbackHandler {
     
     	/** The process environment variables. */
     	private final Map<String, String> env;
     
    +	/** YARN container map. Package private for unit test purposes. */
    +	final Map<String, YarnWorkerNode> workerNodeMap;
    --- End diff --
    
    Let's make it more visible that this map is a concurrent map by setting the type to `CocnurrentHashMap`.


> Implement container release to support dynamic scaling
> ------------------------------------------------------
>
>                 Key: FLINK-7076
>                 URL: https://issues.apache.org/jira/browse/FLINK-7076
>             Project: Flink
>          Issue Type: Sub-task
>          Components: ResourceManager
>            Reporter: Till Rohrmann
>            Assignee: Shuyi Chen
>            Priority: Major
>              Labels: flip-6
>
> In order to support dynamic scaling, the {{YarnResourceManager}} has to be able to dynamically
free containers. We have to implement the {{YarnResourceManager#stopWorker}} method.



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