Kai Wei created MAPREDUCE-5121:
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Summary: Problem with field separator in FieldSelectionHelper
Key: MAPREDUCE-5121
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5121
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 1.0.4
Reporter: Kai Wei
Assignee: Kai Wei
Priority: Trivial
I found that org.apache.hadoop.mapreduce.lib.fieldsel.FieldSelectionHelper and
the corresponding old api org.apache.hadoop.mapred.lib.FieldSelectionMapReduce
take user specified separator string as a regular expression in String.split(),
but also use it as a normal string in StringBuffer.append(). It will be a
problem if the separator string contains meta character. I suggest take
separator literally by calling Pattern.quote(separator). Or just use another
property to specify the separator which should be added in the output.
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