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https://issues.apache.org/jira/browse/YARN-11041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Teke resolved YARN-11041.
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Fix Version/s: 3.5.0
Hadoop Flags: Reviewed
Resolution: Fixed
> Replace all occurences of queuePath with the new QueuePath class - followup
> ---------------------------------------------------------------------------
>
> Key: YARN-11041
> URL: https://issues.apache.org/jira/browse/YARN-11041
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler
> Reporter: Tibor Kovács
> Assignee: Peter Szucs
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0
>
>
> The QueuePath class was introduced in YARN-10897, however, its current
> adoption happened only for code changes after this JIRA. We need to adopt it
> retrospectively.
>
> A lot of changes are introduced via ticket YARN-10982. The replacing should
> be continued by touching the next comments:
>
> [...g/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/AutoCreatedQueueTemplate.java|https://github.com/apache/hadoop/pull/3660/files/f956918bc154d0e35fce07c5dd8be804eb007acc#diff-fde6885144b59bb06b2c3358780388d958829b13f68aceee7bb6d394bb5e0548]
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765012937]
> I think this could be also refactored in a follow-up jira so the string magic
> could probably be replaced with some more elegant solution. Though, I think
> this would be too much in this patch, hence I do suggest the follow-up jira.|
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765013096]
> [~bteke] [ |https://github.com/9uapaw] [~gandras] [
> \|https://github.com/9uapaw] Thoughts?|
> |[~bteke] [https://github.com/apache/hadoop/pull/3660#discussion_r765110750]
> +1, even the QueuePath object could have some kind of support for this.|
> |[~gandras] [https://github.com/apache/hadoop/pull/3660#discussion_r765131244]
> Agreed, let's handle it in a followup!|
>
> ----
>
> [...he/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacitySchedulerConfiguration.java|https://github.com/apache/hadoop/pull/3660/files/f956918bc154d0e35fce07c5dd8be804eb007acc#diff-c4b0c5e70208f1e3cfbd5a86ffa2393e5c996cc8b45605d9d41abcb7e0bd382a]
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765023717]
> There are many string operations in this class:
> E.g. * getQueuePrefix that works with the full queue path
> * getNodeLabelPrefix that also works with the full queue path|
> I suggest to create a static class, called "QueuePrefixes" or something like
> that and add some static methods there to convert the QueuePath object to
> those various queue prefix strings that are ultimately keys in the
> Configuration object.
>
> ----
>
> [...he/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacitySchedulerConfiguration.java|https://github.com/apache/hadoop/pull/3660/files/f956918bc154d0e35fce07c5dd8be804eb007acc#diff-c4b0c5e70208f1e3cfbd5a86ffa2393e5c996cc8b45605d9d41abcb7e0bd382a]
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765026119]
> This seems hacky, just based on the constructor parameter names of QueuePath:
> parent, leaf.
> The AQC Template prefix is not the leaf, obviously.
> Could we somehow circumvent this?|
> |[~bteke] [https://github.com/apache/hadoop/pull/3660#discussion_r765126207]
> Maybe a factory method could be created, which returns a new QueuePath with
> the parent set as the original queuePath. I.e
> rootQueuePath.createChild(String childName) -> this could return a new
> QueuePath object with root.childName path, and rootQueuePath as parent.|
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765039033]
> Looking at this getQueues method, I realized almost all the callers are using
> some kind of string magic that should be addressed with this patch.
> For example, take a look at:
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.MutableCSConfigurationProvider#addQueue
> I think getQueues should also receive the QueuePath object instead of
> Strings.|
>
> ----
>
> [.../src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CSQueue.java|https://github.com/apache/hadoop/pull/3660/files/0c3dd17c936260fc9c386dcabc6368b54b27aa82..39f4ec203377244f840e4593aa02386ff51cc3c4#diff-0adf8192c51cbe4671324f06f7f8cbd48898df0376bbcc516451a3bdb2b48d3b]
> |[~bteke] [https://github.com/apache/hadoop/pull/3660#discussion_r765912967]
> Nit: Gets the queue path object.
> The object of the queue suggests a CSQueue object.|
> |[~snemeth] [https://github.com/apache/hadoop/pull/3660#discussion_r765922133]
> Will fix the nit upon commit if I'm fine with the whole patch. Thanks for
> noticing.|
>
>
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