Stan Rosenberg created MAPREDUCE-5247:
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Summary: FileInputFormat should filter files with '._COPYING_'
sufix
Key: MAPREDUCE-5247
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5247
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Stan Rosenberg
FsShell copy/put creates staging files with '._COPYING_' suffix. These files
should be considered hidden by FileInputFormat. (A simple fix is to add the
following conjunct to the existing hiddenFilter: !name.endsWith("._COPYING_").)
After upgrading to CDH4.2.0 we got bitten by this. We have a legacy data loader
which uses 'hadoop fs -put' to load data into hourly partitions. We also have
intra-hourly jobs which are scheduled to execute several times per hour using
the same hourly partition as input. Thus, as the new data is continuously
loaded, these staging files (i.e., ._COPYING_) are breaking our jobs (since
when copy/put completes staging files are moved).
As a workaround, we've defined a custom input path filter and loaded it with
"mapred.input.pathFilter.class".
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