FAQ
I have a Hadoop 0.16.4 cluster that effectively has no HDFS. It's
running a job analyzing data stored on a NAS type system mounted on
each tasktracker.

Unfortunately, the reducers task_200808062237_0031_r_000000_0 and
task_200808062237_0031_r_000000_1 are running simultaneously on the
same keys, redoing each other's work and stomping on each others
output files.

I've attached the JSP output that indicates this; let me know if you
need any other details.

Is this a configuration error, or is it a bug in Hadoop?

Cheers,
Anthony

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postedAug 12, '08 at 2:04a
activeAug 12, '08 at 5:37a
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