This filename is coming from here: http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/constant-values.html In general for hadoop you may want to avoid looking at any "_*" file since those are Hadoop related files like (_temporary, _log,…)
/Jerome. From: Eric Yang <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Thu, 24 Feb 2011 10:55:57 -0800 To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: _SUCCESS files appearing in demuxOutput 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: http://people.apache.org/~eyang/ Regards, Eric On 2/24/11 10:12 AM, "Corbin Hoenes" <[email protected]> wrote: Anyone seen this? /chukwa/postProcess/demuxOutputDir_1298061686862/_SUCCESS I clean them out and I keep getting the same file showing up and chukwa doesn't know how to handle it: postProcess.log: 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: java.io.IOException: hdfs://cluster1/chukwa/postProcess/demuxOutputDir_1298061686862/_SUCCESS is not a directory! at org.apache.hadoop.chukwa.extraction.demux.MoveToRepository.processClutserDirectory(MoveToRepository.java:54) at org.apache.hadoop.chukwa.extraction.demux.MoveToRepository.main(MoveToRepository.java:250) at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.movetoMainRepository(PostProcessorManager.java:201) at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.start(PostProcessorManager.java:146) at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.main(PostProcessorManager.java:80)
