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https://issues.apache.org/jira/browse/YARN-7669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16298560#comment-16298560
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Sunil G commented on YARN-7669:
-------------------------------
Thanks [~asuresh] and [~kkaranasos]
Few doubts and comments in this patch.
# How {{ApplicationMasterServiceUtils#addToRejectedSchedulingRequests}} is
invoked? I could not find a caller or is it a part of some dependent tickets?
# {{AllocateResponse#getRejectedSchedulingRequests}} gives rejected requests
from previous allocate to current one. But will this info be retained at
scheduler assuming RM restarted between AM heartbeats? Also one more doubt
here,
# Could {{RejectionReason}} also be used in cases like Node Constraints too?
Its also possible that placement could fail may be node constraint also
violated on a node.
# In line with above comment, I think *RejectionReason* enum could only provide
a very minimal reject reason. COULD_NOT_SCHEDULE_ON_NODE could happen due to
multiple reasons. But I also think having a string to give diag is also too
descriptive and AM's could not decode same. I think we could add more enums as
error codes than giving a high level one error code like
COULD_NOT_SCHEDULE_ON_NODE?
> [API] Introduce interfaces for placement constraint processing
> --------------------------------------------------------------
>
> Key: YARN-7669
> URL: https://issues.apache.org/jira/browse/YARN-7669
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Arun Suresh
> Assignee: Arun Suresh
> Attachments: YARN-7669-YARN-6592.001.patch,
> YARN-7669-YARN-6592.002.patch, YARN-7669-YARN-6592.003.patch
>
>
> As per discussions in YARN-7612. This JIRA will introduce the generic
> interfaces which will be implemented in YARN-7612
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