Hi,
According to docs, I thought dfs -test -e URI would return 0 if file
exists,
but that does not appear to be the case.
- Fedora 9
- java
java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) 64-Bit Server VM (build 10.0-b23, mixed mode)
test
Usage: hadoop dfs -test -[ezd] URI
Options:
-e check to see if the file exists. Return 0 if true.
-z check to see if the file is zero length. Return 0 if true
-d check return 1 if the path is directory else return 0.
This is what I get.
dfs -ls return code is 0 , this is ok.
[EMAIL PROTECTED] hadoop-0.17.1]$ /home/hadoop/hadoop-0.17.1/bin/hadoop dfs
-ls /frank/unittest/tmpGeKbCF.txt
Found 1 items
/frank/unittest/tmpGeKbCF.txt <r 3> 13 2008-08-06 23:57
rw-r--r-- frank supergroup
[EMAIL PROTECTED] hadoop-0.17.1]$ echo $?
0
Now run dfs -test -e on same file, note return code is 1
[EMAIL PROTECTED] hadoop-0.17.1]$
[EMAIL PROTECTED] hadoop-0.17.1]$ /home/hadoop/hadoop-0.17.1/bin/hadoop dfs
-test -e /frank/unittest/tmpGeKbCF.txt
[EMAIL PROTECTED] hadoop-0.17.1]$ echo $?
1
This time try a file I know does not exist (I rrop the last char off the
end of the filename for test)
Note the return code is 0
[EMAIL PROTECTED] hadoop-0.17.1]$
[EMAIL PROTECTED] hadoop-0.17.1]$ /home/hadoop/hadoop-0.17.1/bin/hadoop dfs
-test -e /frank/unittest/tmpGeKbCF.tx
[EMAIL PROTECTED] hadoop-0.17.1]$ echo $?
0
[EMAIL PROTECTED] hadoop-0.17.1]$
Thanks / Frank
