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https://issues.apache.org/jira/browse/MAPREDUCE-6529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei Chen updated MAPREDUCE-6529:
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Description:
I am viewing code in RMContainerAllocator.java. I want to do some improvement
so that the AppMaster could give up some containers that may not be optimal
when it receives new assigned containers. But I found that if AppMaster give
up the containers, it will not retry to request the resource again.
int RMContainerRequestor.java, Set<ResourceRequest> ask is used to ask
resource from ResourceManager. I found each container could only be requested
once. It mean ask can be filled by addResourceRequestToAsk(ResourceRequest
remoteRequest[]), but it can only added for once for each container. If we give
up one assigned container, It will never request again
> AppMaster will not retry to request resource if AppMaster happens to decide
> to not use the resource
> ---------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6529
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6529
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mr-am
> Affects Versions: 2.6.0
> Reporter: Wei Chen
>
> I am viewing code in RMContainerAllocator.java. I want to do some
> improvement so that the AppMaster could give up some containers that may not
> be optimal when it receives new assigned containers. But I found that if
> AppMaster give up the containers, it will not retry to request the resource
> again.
> int RMContainerRequestor.java, Set<ResourceRequest> ask is used to ask
> resource from ResourceManager. I found each container could only be requested
> once. It mean ask can be filled by addResourceRequestToAsk(ResourceRequest
> remoteRequest[]), but it can only added for once for each container. If we
> give up one assigned container, It will never request again
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