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https://issues.apache.org/jira/browse/MAPREDUCE-7072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16448958#comment-16448958
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Robert Kanter commented on MAPREDUCE-7072:
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Great investigation [~wilfreds]! The patch looks good overall, just one thing:
# Instead of using the iterator:
{code:java}
Iterator<CounterGroup> groupNames = totalCounters.iterator();
while (groupNames.hasNext()) {
String groupName = groupNames.next().getName();
{code}
I think we can still do a for-each loop like this:
{code:java}
for (CounterGroup counterGroup : totalCounters) {
String groupName = counterGroup.getName();
{code}
> mapred job -history prints duplicate counter in human output
> ------------------------------------------------------------
>
> Key: MAPREDUCE-7072
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7072
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: client
> Affects Versions: 3.0.0
> Reporter: Wilfred Spiegelenburg
> Assignee: Wilfred Spiegelenburg
> Priority: Major
> Attachments: MAPREDUCE-7072.01.patch
>
>
> 'mapred job -history' command prints duplicate entries for counters only for
> the human output format. It does not do this for the JSON format.
> mapred job -history /user/history/somefile.jhist -format human
> {code}
> ....
> |Job Counters |Total megabyte-seconds taken by all map tasks|0 |0 |268,288,000
> ...
> |Job Counters |Total megabyte-seconds taken by all map tasks|0 |0 |268,288,000
> ....
> {code}
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