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https://issues.apache.org/jira/browse/YARN-2380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated YARN-2380:
-----------------------------
    Assignee: Jian Fang

> The normalizeRequests method in SchedulerUtils always resets the vCore to 1
> ---------------------------------------------------------------------------
>
>                 Key: YARN-2380
>                 URL: https://issues.apache.org/jira/browse/YARN-2380
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Jian Fang
>            Assignee: Jian Fang
>            Priority: Critical
>         Attachments: YARN-2380.patch
>
>
> I added some log info to the method normalizeRequest() as follows.
>   public static void normalizeRequest(
>       ResourceRequest ask, 
>       ResourceCalculator resourceCalculator, 
>       Resource clusterResource,
>       Resource minimumResource,
>       Resource maximumResource,
>       Resource incrementResource) {
>     LOG.info("Before request normalization, the ask capacity: " + 
> ask.getCapability());
>     Resource normalized = 
>         Resources.normalize(
>             resourceCalculator, ask.getCapability(), minimumResource,
>             maximumResource, incrementResource);
>     LOG.info("After request normalization, the ask capacity: " + normalized);
>     ask.setCapability(normalized);
>   }
> The resulted log showed that the vcore in ask was changed from 2 to 1.
> 2014-08-01 20:54:15,537 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils (IPC 
> Server handler 4 on 9024): Before request normalization, the ask capacity: 
> <memory:1536, vCores:2>
> 2014-08-01 20:54:15,537 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils (IPC 
> Server handler 4 on 9024): After request normalization, the ask capacity: 
> <memory:1536, vCores:1>
> The root cause is the DefaultResourceCalculator calls 
> Resources.createResource(normalizedMemory) to regenerate a new resource with 
> vcore = 1.
> This bug is critical and it leads to the mismatch of the request resource and 
> the container resource and many other potential issues if the user requests 
> containers with vcore > 1.



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