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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3304) ResourceCalculatorProcessTree#getCpuUsagePercent default return value is inconsistent with other getters
Date Tue, 31 Mar 2015 17:46:54 GMT

    [ https://issues.apache.org/jira/browse/YARN-3304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14388929#comment-14388929
] 

Vinod Kumar Vavilapalli commented on YARN-3304:
-----------------------------------------------

Interesting discussion.

The expectation on deprecated APIs is that they are going to be deleted in the next major
release. We do not need to explicitly say so for each deprecated API.

That said, in practice, we don't tend to remove deprecated APIs in the next release itself.
For example, we have tried this with old MR job APIs which we went back on given the very
long tail. So even though we set the expectation of deprecated-APIs removal in next release,
we conservatively do so a little later in practice.

Back to the patch. [~djp], can you address these?
bq. Also, can we deprecate (..) getCumulativeRssmem(int) and getCumulativeVmem(int)? 


> ResourceCalculatorProcessTree#getCpuUsagePercent default return value is inconsistent
with other getters
> --------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3304
>                 URL: https://issues.apache.org/jira/browse/YARN-3304
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>            Reporter: Junping Du
>            Assignee: Junping Du
>            Priority: Blocker
>             Fix For: 2.7.0
>
>         Attachments: YARN-3304-appendix-v2.patch, YARN-3304-appendix.patch, YARN-3304-v2.patch,
YARN-3304-v3.patch, YARN-3304-v4-boolean-way.patch, YARN-3304-v4-negative-way-MR.patch, YARN-3304-v4-negtive-value-way.patch,
YARN-3304-v6-no-rename.patch, YARN-3304-v6-with-rename.patch, YARN-3304-v7.patch, YARN-3304-v8.patch,
YARN-3304.patch, yarn-3304-5.patch
>
>
> Per discussions in YARN-3296, getCpuUsagePercent() will return -1 for unavailable case
while other resource metrics are return 0 in the same case which sounds inconsistent.



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