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Posted to issues@flink.apache.org by "Till Rohrmann (Jira)" <ji...@apache.org> on 2020/04/27 07:25:01 UTC
[jira] [Assigned] (FLINK-17390) Container resource cannot be mapped
on Hadoop 2.10+
[ https://issues.apache.org/jira/browse/FLINK-17390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Till Rohrmann reassigned FLINK-17390:
-------------------------------------
Assignee: Xintong Song
> Container resource cannot be mapped on Hadoop 2.10+
> ---------------------------------------------------
>
> Key: FLINK-17390
> URL: https://issues.apache.org/jira/browse/FLINK-17390
> Project: Flink
> Issue Type: Bug
> Components: Deployment / YARN
> Affects Versions: 1.11.0
> Reporter: Xintong Song
> Assignee: Xintong Song
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.11.0
>
>
> In FLINK-16438, we introduced {{WorkerSpecContainerResourceAdapter}} for mapping Yarn container {{Resource}} with Flink {{WorkerResourceSpec}}. Inside this class, we use {{Resource}} for hash map keys and set elements, assuming that {{Resource}} instances that describes the same set of resources have the same hash code.
> This assumption is not always true. {{Resource}} is an abstract class and may have different implementations. In Hadoop 2.10+, {{LightWeightResource}}, a new implementation of {{Resource}}, is introduced for {{Resource}} generated by {{Resource.newInstance}} on the AM side, which overrides the {{hashCode}} method. That means, a {{Resource}} generated on AM may have a different hash code compared to an equal {{Resource}} returned from Yarn.
> To solve this problem, we may introduce an {{InternalResource}} as an inner class of {{WorkerSpecContainerResourceAdapter}}, with {{hashCode}} method depends only on the fields needed by Flink (ATM memroy and vcores). {{WorkerSpecContainerResourceAdapter}} should only use {{InternalResource}} for internal state management, and do conversions for {{Resource}} passed into and returned from it.
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