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https://issues.apache.org/jira/browse/MAPREDUCE-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dick King updated MAPREDUCE-1073:
---------------------------------
Attachment: MAPREDUCE-1073--yhadoop20--2010-07-22--1530.patch
I revised the patch to not add an API to read and set set the property that
tells MapTask.TrackedRecordReader to not record
progress as it reads the input; just read and set the property "by hand" in the
code. Since this is a
pipes-specific feature, it should be handled only by a focused attribute, which
I then renamed to
mapred.pipes.disable.record.reader.progress .
In
https://issues.apache.org/jira/browse/MAPREDUCE-1073?focusedCommentId=12891327&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12891327
, the API for marking a job as having mappers who will indicate their own
progress is now to just set the property, which I have renamed from
{{mapred.job.disable.record.reader.progress}} to
{{mapred.pipes.disable.record.reader.progress}} , because this is a pipes-only
concept.
> Progress reported for pipes tasks is incorrect.
> -----------------------------------------------
>
> Key: MAPREDUCE-1073
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1073
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: pipes
> Affects Versions: 0.20.1
> Reporter: Sreekanth Ramakrishnan
> Assignee: Dick King
> Attachments: mapreduce-1073--2010-03-31.patch,
> mapreduce-1073--2010-04-06.patch,
> MAPREDUCE-1073--yhadoop20--2010-07-22--1530.patch,
> MAPREDUCE-1073--yhadoop20--2010-07-22.patch, MAPREDUCE-1073_yhadoop20.patch
>
>
> Currently in pipes,
> {{org.apache.hadoop.mapred.pipes.PipesMapRunner.run(RecordReader<K1, V1>,
> OutputCollector<K2, V2>, Reporter)}} we do the following:
> {code}
> while (input.next(key, value)) {
> downlink.mapItem(key, value);
> if(skipping) {
> downlink.flush();
> }
> }
> {code}
> This would result in consumption of all the records for current task and
> taking task progress to 100% whereas the actual pipes application would be
> trailing behind.
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