MENG DING updated YARN-1643:
    Attachment: YARN-1643-YARN-1197.7.patch

Attaching latest patch which addressed the following:
* Make {{trackingContainers}} a ConcurrentHashMap, and remove 
{{containersToBeRemoved}} and {{containersToBeAdded}} and corresponding logic. 
Containers are directly added to/removed from/updated in {{trackingContainers}} 
when corresponding events are received.
* Synchronize getters and setters in {{ProcessTreeInfo}} with regard to the 
vmemLimit/pmemLimit/cpuVcores fields.
* Previous patch didn't handle container metrics update for container resize. 
Add it and extract container metrics logic into a common function.
* Add relevant test cases

> Make ContainersMonitor can support change monitoring size of an allocated 
> container in NM side
> ----------------------------------------------------------------------------------------------
>                 Key: YARN-1643
>                 URL: https://issues.apache.org/jira/browse/YARN-1643
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Wangda Tan
>            Assignee: MENG DING
>         Attachments: YARN-1643-YARN-1197.4.patch, 
> YARN-1643-YARN-1197.5.patch, YARN-1643-YARN-1197.6.patch, 
> YARN-1643-YARN-1197.7.patch, YARN-1643.1.patch, YARN-1643.2.patch, 
> YARN-1643.3.patch

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