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https://issues.apache.org/jira/browse/YARN-7494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16845536#comment-16845536
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tianjuan commented on YARN-7494:
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seems that ResourceUsageMultiNodeLookupPolicy may cause Application starve
forever
for example, there are 10 nodes(h1,h2,...h9,h10), each has 8G memory in
cluster, and two queues A,B, each is configured with 50% capacity.
firstly there are 10 jobs (each requests 6G respurce) is submited to queue A,
and each node of the 10 nodes will have a contianer allocated.
Afterwards, another job JobB which requests 3G resource is submited to queue
B, and there will be one container with 3G size reserved on node h1,
with ResourceUsageMultiNodeLookupPolicy, the order policy will always be
h1,h2,..h9,h10, and there will always be one container re-reverved on node h1,
no other reservation happen, JobB will hang forever, [~sunilg] what's ypur
thought about this situation?
> Add muti-node lookup mechanism and pluggable nodes sorting policies to
> optimize placement decision
> --------------------------------------------------------------------------------------------------
>
> Key: YARN-7494
> URL: https://issues.apache.org/jira/browse/YARN-7494
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler
> Reporter: Sunil Govindan
> Assignee: Sunil Govindan
> Priority: Major
> Fix For: 3.2.0
>
> Attachments: YARN-7494.001.patch, YARN-7494.002.patch,
> YARN-7494.003.patch, YARN-7494.004.patch, YARN-7494.005.patch,
> YARN-7494.006.patch, YARN-7494.007.patch, YARN-7494.008.patch,
> YARN-7494.009.patch, YARN-7494.010.patch, YARN-7494.11.patch,
> YARN-7494.12.patch, YARN-7494.13.patch, YARN-7494.14.patch,
> YARN-7494.15.patch, YARN-7494.16.patch, YARN-7494.17.patch,
> YARN-7494.18.patch, YARN-7494.19.patch, YARN-7494.20.patch,
> YARN-7494.v0.patch, YARN-7494.v1.patch, multi-node-designProposal.png
>
>
> Instead of single node, for effectiveness we can consider a multi node lookup
> based on partition to start with.
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