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From Eric Yang <>
Subject Re: _SUCCESS files appearing in demuxOutput
Date Thu, 24 Feb 2011 18:55:57 GMT
Hi Corbin,

I have not seen this.  What is the version of hadoop that you are using, are you using 0.21?
 It looks like the _SUCCESS file is spill out after demux mapreduce job.  There are two possibilities
leading to the creation of this file.  Demux is modified and it is doing something that is
unexpected, or the mapreduce framework 0.21 put that file there.
If you are using 0.21, I would recommend to avoid it.

A more stable version of Hadoop is 0.20.100 branch, and you can download it from:


On 2/24/11 10:12 AM, "Corbin Hoenes" <> wrote:

Anyone seen this?


I clean them out and I keep getting the same file showing up and chukwa doesn't know how to
handle it:

2011-02-21 06:51:55,027 INFO main MoveToRepository - main procesing Cluster (_SUCCESS)
2011-02-21 06:51:55,027 INFO main MoveToRepository - processClutserDirectory (_SUCCESS,/chukwa/repos//_SUCCESS)
2011-02-21 06:51:55,028 WARN main PostProcessorManager - Error in processDemuxOutput: hdfs://cluster1/chukwa/postProcess/demuxOutputDir_1298061686862/_SUCCESS
is not a directory!
    at org.apache.hadoop.chukwa.extraction.demux.MoveToRepository.processClutserDirectory(
    at org.apache.hadoop.chukwa.extraction.demux.MoveToRepository.main(
    at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.movetoMainRepository(
    at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.start(
    at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.main(

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