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https://issues.apache.org/jira/browse/YARN-5774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15770723#comment-15770723
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Yufei Gu commented on YARN-5774:
--------------------------------
Hi [~wangda], I understand it looks like different in doc. But
{{ResourceRequest}} just inherits from {{AbstractResourceRequest}} and doesn't
lose anything. All the functions and their property(public/stable) are still
there. Any user code can interact with {{ResourceRequest}} without changes.
What Apache Hadoop Compatibility document said for a Public-Stable Java API is
strictly guaranteed.
{quote}
Public-Stable API compatibility is required to ensure end-user programs and
downstream projects continue to work without modification.
{quote}
However, if you don't like the solution, we can always file a new JIRA for a
potential better solution. Anybody interested can work on it.
> MR Job stuck in ACCEPTED status without any progress in Fair Scheduler if set
> yarn.scheduler.minimum-allocation-mb to 0.
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-5774
> URL: https://issues.apache.org/jira/browse/YARN-5774
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 3.0.0-alpha1
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Priority: Blocker
> Labels: oct16-easy
> Fix For: 2.8.0, 3.0.0-alpha2
>
> Attachments: YARN-5774.001.patch, YARN-5774.002.patch,
> YARN-5774.003.patch, YARN-5774.004.patch, YARN-5774.005.patch,
> YARN-5774.006.patch, YARN-5774.007.patch
>
>
> MR Job stuck in ACCEPTED status without any progress in Fair Scheduler
> because there is no resource request for the AM. This happened when you
> configure {{yarn.scheduler.minimum-allocation-mb}} to zero.
> The problem is in the code used by both Capacity Scheduler and Fair
> Scheduler. {{scheduler.increment-allocation-mb}} is a concept in FS, but not
> CS. So the common code in class RMAppManager passes the
> {{yarn.scheduler.minimum-allocation-mb}} as incremental one because there is
> no incremental one for CS when it tried to normalize the resource requests.
> {code}
> SchedulerUtils.normalizeRequest(amReq, scheduler.getResourceCalculator(),
> scheduler.getClusterResource(),
> scheduler.getMinimumResourceCapability(),
> scheduler.getMaximumResourceCapability(),
> scheduler.getMinimumResourceCapability()); --> incrementResource
> should be passed here.
> {code}
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