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https://issues.apache.org/jira/browse/MAPREDUCE-6816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15724626#comment-15724626
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Akira Ajisaka commented on MAPREDUCE-6816:
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Thanks [~shenyinjie] for providing a patch! YARN-2123 replaced
{{StringHelper.percent(arg)}} with {{StringUtils.formatPercent(arg, 2)}}, which
is the cause of the regression. The former does not output '%' but the latter
outputs '%', so we should have used {{StringUtils.format("%.2f", arg * 100)}}
instead. Therefore, would you replace {{StringUtils.formatPercent(arg, 2)}}
with {{StringUtils.format("%.2f", arg * 100)}} instead of the removal of
joining '%'?
Sorry for my mistake in YARN-2123.
> Progress bars in Web UI always at 100%
> ---------------------------------------
>
> Key: MAPREDUCE-6816
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6816
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: webapps
> Reporter: Shen Yinjie
> Assignee: Shen Yinjie
> Priority: Blocker
> Attachments: MAPREDUCE-6816.01.patch, MAPREDUCE-6816.patch, pre.png
>
>
> YARN web UI always shows progress bars at 100% (see screenshot, progress of
> the reduce step is roughly at 40.00%). I opened the HTML source code to check
> (also see screenshot), and it seems the problem is that it uses "%%" ,which
> cannot be recognized. This is due to the output of {{StringUtils.format()}}
> contains '%', while in *Block.java use {{join()}} add an extra '%'.
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