Harsh J created HADOOP-8395:
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Summary: Text shell command unnecessarily demands that a
SequenceFile's key class be WritableComparable
Key: HADOOP-8395
URL: https://issues.apache.org/jira/browse/HADOOP-8395
Project: Hadoop Common
Issue Type: Bug
Components: util
Affects Versions: 2.0.0
Reporter: Harsh J
Priority: Trivial
Text from Display set of Shell commands (hadoop fs -text), has a strict
subclass check for a sequence-file-header loaded key class to be a subclass of
WritableComparable.
The sequence file writer itself has no such checks (one can create sequence
files with just plain writable keys, comparable is needed for sequence file's
sorter alone, which not all of them use always), and hence its not reasonable
for Text command to carry it either.
We should relax the check and simply just check for "Writable", not
"WritableComparable".
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