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https://issues.apache.org/jira/browse/YARN-8292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479773#comment-16479773
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Wangda Tan commented on YARN-8292:
----------------------------------
And forgot to mention:
The issue reported by [~eepayne] is caused by this:
{code}
sub.normalizedGuarantee, Resource.newInstance(1, 1));
{code
Inside {{AbstractPreemptableResourceCalculator}}, when we have 3-rd resource
type, it will make the ideal_assign of queues less than actual in some cases. I
fixed it by using a (1, 1, ..) resource:
{code}
157 Resource stepFactor = Resource.newInstance(0, 0);
158 for (ResourceInformation ri : stepFactor.getResources()) {
159 ri.setValue(1);
160 }
{code}
> Fix the dominant resource preemption cannot happen when some of the resource
> vector becomes negative
> ----------------------------------------------------------------------------------------------------
>
> Key: YARN-8292
> URL: https://issues.apache.org/jira/browse/YARN-8292
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Reporter: Sumana Sathish
> Assignee: Wangda Tan
> Priority: Critical
> Attachments: YARN-8292.001.patch, YARN-8292.002.patch,
> YARN-8292.003.patch, YARN-8292.004.patch
>
>
> This is an example of the problem:
>
> {code}
> // guaranteed, max, used, pending
> "root(=[30:18:6 30:18:6 12:12:6 1:1:1]);" + //root
> "-a(=[10:6:2 10:6:2 6:6:3 0:0:0]);" + // a
> "-b(=[10:6:2 10:6:2 6:6:3 0:0:0]);" + // b
> "-c(=[10:6:2 10:6:2 0:0:0 1:1:1])"; // c
> {code}
> There're 3 resource types. Total resource of the cluster is 30:18:6
> For both of a/b, there're 3 containers running, each of container is 2:2:1.
> Queue c uses 0 resource, and have 1:1:1 pending resource.
> Under existing logic, preemption cannot happen.
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