hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Chris Douglas <chri...@yahoo-inc.com>
Subject Re: dfs -test -e question
Date Thu, 07 Aug 2008 17:21:41 GMT
Yes, this is backwards; it was fixed in HADOOP-3792 and committed to  
trunk (0.19). -C

On Aug 6, 2008, at 10:44 PM, Frank Singleton wrote:

> 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.
>
> [hadoop@cray64 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
> [hadoop@cray64 hadoop-0.17.1]$ echo $?
> 0
>
> Now run dfs -test -e on same file, note return code is 1
>
> [hadoop@cray64 hadoop-0.17.1]$
> [hadoop@cray64 hadoop-0.17.1]$ /home/hadoop/hadoop-0.17.1/bin/hadoop  
> dfs -test -e /frank/unittest/tmpGeKbCF.txt
> [hadoop@cray64 hadoop-0.17.1]$ echo $?
> 1
>
> This time try a file I know does not exist (I rrop the last char off  
> the end of the filename for test)
> Note the return code is 0
>
> [hadoop@cray64 hadoop-0.17.1]$
> [hadoop@cray64 hadoop-0.17.1]$ /home/hadoop/hadoop-0.17.1/bin/hadoop  
> dfs -test -e /frank/unittest/tmpGeKbCF.tx
> [hadoop@cray64 hadoop-0.17.1]$ echo $?
> 0
> [hadoop@cray64 hadoop-0.17.1]$
>
> Thanks / Frank
>
>


Mime
View raw message