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https://issues.apache.org/jira/browse/YARN-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052727#comment-14052727
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Vinod Kumar Vavilapalli commented on YARN-2142:
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bq. In the cluster ,every node has been registered on one machine which is OAT 
server;
bq. If the node's info(maybe BIOS info ,system info etc) was edited,and the 
current info is not equal to register info ,we can call this nodes is not TRUST 
.
Can you please reply to my question on what a OAT server is? May be some 
hyperlinks/references?

It's very hard to understand what this patch is doing, what its design is and 
why it should be done this way inside YARN. Please post a requirements + design 
doc so the rest of us can understand your intentions. Thanks.


> Add one service to check the nodes' TRUST status 
> -------------------------------------------------
>
>                 Key: YARN-2142
>                 URL: https://issues.apache.org/jira/browse/YARN-2142
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager, resourcemanager, scheduler, webapp
>         Environment: OS:Ubuntu 13.04; 
> JAVA:OpenJDK 7u51-2.4.4-0
> Only in branch-2.2.0.
>            Reporter: anders
>            Priority: Minor
>              Labels: features
>         Attachments: trust .patch, trust.patch, trust.patch, trust.patch, 
> trust001.patch, trust002.patch, trust003.patch, trust2.patch
>
>   Original Estimate: 1m
>  Remaining Estimate: 1m
>
> Because of critical computing environment ,we must test every node's TRUST 
> status in the cluster (We can get the TRUST status by the API of OAT 
> sever),So I add this feature into hadoop's schedule .
> By the TRUST check service ,node can get the TRUST status of itself,
> then through the heartbeat ,send the TRUST status to resource manager for 
> scheduling.
> In the scheduling step,if the node's TRUST status is 'false', it will be 
> abandoned until it's TRUST status turn to 'true'.
> ***The logic of this feature is similar to node's health checkservice.
> ***Only in branch-2.2.0 , not in trunk***



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