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https://issues.apache.org/jira/browse/HADOOP-1144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12492636
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Andrzej Bialecki commented on HADOOP-1144:
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+1 for mapred.task.failures.percent. Another scenario where we might want to
salvage partially completed map tasks is when they work with corrupted input
data. I.e. it would be nice to have a similar knob for InputFormat, so that it
tolerates data that causes RecordReader to throw an exception without failing
the TIP - i.e. to treat such errors as a regular end of input data.
> Hadoop should allow a configurable percentage of failed map tasks before
> declaring a job failed.
> ------------------------------------------------------------------------------------------------
>
> Key: HADOOP-1144
> URL: https://issues.apache.org/jira/browse/HADOOP-1144
> Project: Hadoop
> Issue Type: Improvement
> Components: mapred
> Affects Versions: 0.12.0
> Reporter: Christian Kunz
> Assigned To: Arun C Murthy
> Fix For: 0.13.0
>
>
> In our environment it can occur that some map tasks will fail repeatedly
> because of corrupt input data, which sometimes is non-critical as long as the
> amount is limited. In this case it is annoying that the whole Hadoop job
> fails and cannot be restarted till the corrupt data are identified and
> eliminated from the input. It would be extremely helpful if the job
> configuration would allow to indicate how many map tasks are allowed to fail.
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