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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7688) Miscellaneous Improvements To ProcfsBasedProcessTree
Date Fri, 29 Dec 2017 00:19:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-7688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16305839#comment-16305839
] 

Miklos Szegedi commented on YARN-7688:
--------------------------------------

Thank you for the patch [~belugabehr]. I have a few comments.
{code}
245	      Queue<ProcessInfo> pInfoQueue = new ArrayDeque<ProcessInfo>();
246	      pInfoQueue.addAll(me.getChildren());
{code}
What is the point of creating an ArrayDeque without an initial capacity, when the future content
is known already?
{code}
433	        isAvailable = true;
434	        incJiffies += p.getDtime();
{code}
What the point of this reordering?
{code}
727	          if (StringUtils.EMPTY.equals(ret)) {
{code}
Could you use just isEmpty()?




> Miscellaneous Improvements To ProcfsBasedProcessTree
> ----------------------------------------------------
>
>                 Key: YARN-7688
>                 URL: https://issues.apache.org/jira/browse/YARN-7688
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 3.0.0
>            Reporter: BELUGA BEHR
>            Priority: Minor
>         Attachments: YARN-7688.1.patch
>
>
> * Use ArrayDeque for performance instead of LinkedList
> * Use more Apache Commons routines to replace existing implementations
> * Remove superfluous code guards around DEBUG statements
> * Remove superfluous annotations in the tests
> * Other small improvements



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