DFSShell problems. Incorrect block replication detection in fsck.
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Key: HADOOP-226
URL: http://issues.apache.org/jira/browse/HADOOP-226
Project: Hadoop
Type: Bug
Components: dfs
Environment: All
Reporter: Konstantin Shvachko
1. We need to adjust Dfsck to the new per-file replication feature.
fsck checks block replication based on the configured global replication
parameter.
Which is now just the default. The actual file replication is returned in
DFSFileInfo.
So at least the reporting is screwed by that, although I didn't check what will
happen with
other options -move and -delete.
2. fsck throws NullPointerException if you type
bin/hadoop fsck -files /doc
instead of
bin/hadoop fsck /doc -files
3. Unfortunately, there are several commands that throw different kinds of
Exceptions
rather than at least printing the usage info, when some of its arguments are
missing or
misplaced. ArrayIndexOutOfBoundsException is one them. Try
bin/hadoop dfs -mv
bin/hadoop dfs -cp
bin/hadoop dfs -rm
4. In general the shell is growing and getting more sophisticated.
Should we work out a general convention on how the parameters should be
structured, named,
short/long version of the keywords, help, etc.
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