Shen Yinjie created MAPREDUCE-6816:

             Summary: Progress bars in Web UI always at 100% 
                 Key: MAPREDUCE-6816
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: webapps
    Affects Versions: 3.0.0-alpha2
            Reporter: Shen Yinjie
            Assignee: Shen Yinjie

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{code}StringUtils.format(){code} 
contains '%', while in * use {code}join{code}add an extra '%'.

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