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https://issues.apache.org/jira/browse/YARN-116?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J updated YARN-116:
-------------------------

    Attachment: YARN-116.patch

Cleaned up Xie's patch. Doesn't depend on YarnConfiguration in the refreshNodes 
signature, formatted the test-cases and removed unwanted checks.
                
> RM is missing ability to add include/exclude files without a restart
> --------------------------------------------------------------------
>
>                 Key: YARN-116
>                 URL: https://issues.apache.org/jira/browse/YARN-116
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.0.0-alpha
>            Reporter: xieguiming
>         Attachments: HADOOP-835-0.patch, HADOOP-835-1.patch, 
> HADOOP-835.patch, YARN-116.patch
>
>
> The "yarn.resourcemanager.nodes.include-path" default value is "", if we need 
> to add an include file, we must currently restart the RM. 
> I suggest that for adding an include or exclude file, there should be no need 
> to restart the RM. We may only execute the refresh command. The HDFS NameNode 
> already has this ability.
> Fix is to the modify HostsFileReader class instances:
> From:
> {code}
> public HostsFileReader(String inFile, 
>                          String exFile)
> {code}
> To:
> {code}
>  public HostsFileReader(Configuration conf, 
>                          String NODES_INCLUDE_FILE_PATH,String 
> DEFAULT_NODES_INCLUDE_FILE_PATH,
>                         String NODES_EXCLUDE_FILE_PATH,String 
> DEFAULT_NODES_EXCLUDE_FILE_PATH)
> {code}
> And thus, we can read the config file dynamically when a {{refreshNodes}} is 
> invoked and therefore have no need to restart the ResourceManager.

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