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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4807) MockAM#waitForState sleep duration is too long
Date Mon, 18 Apr 2016 18:14:25 GMT

    [ https://issues.apache.org/jira/browse/YARN-4807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15246217#comment-15246217

Daniel Templeton commented on YARN-4807:

Thanks for the update, [~yufeigu].

Back to those loops...  I don't think converting the while loops to for loops is the right
idea.  You end up with ugly for loops.  My rule of thumb is that a for loop is for iterating
through a sequence with a known number of steps; while loops are for everything else.  I think
your previous structure:

while (timeWaiting < tooLong) {

  timeWaiting += timeWaited;

was perfectly reasonable.

Some of the loops are for-while combinations.  I think the best approach in those cases is
to split the conditions like:

while (conditionsTrue) {
  if (timeWaiting >= tooLong) {

  timeWaiting += timeWaited;

It might also be clearer to count the time spent sleeping rather than counting the number
of retries, since the latter is just a derivative of the former.

In the javadocs, I think you mean "has" everywhere you used "had".  Also "if any" is a little
too terse for the exception explanation.  How about "thrown if an unexpected error occurs"?

> MockAM#waitForState sleep duration is too long
> ----------------------------------------------
>                 Key: YARN-4807
>                 URL: https://issues.apache.org/jira/browse/YARN-4807
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 2.8.0
>            Reporter: Karthik Kambatla
>            Assignee: Yufei Gu
>              Labels: newbie
>         Attachments: YARN-4807.001.patch, YARN-4807.002.patch, YARN-4807.003.patch, YARN-4807.004.patch,
YARN-4807.005.patch, YARN-4807.006.patch, YARN-4807.007.patch, YARN-4807.008.patch, YARN-4807.009.patch
> MockAM#waitForState sleep duration (500 ms) is too long. Also, there is significant duplication
with MockRM#waitForState.

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