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https://issues.apache.org/jira/browse/HDFS-5740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved HDFS-5740.
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Resolution: Not a Problem
This is no longer an issue on branch-2 and trunk today. The command accepts a
collection of files now, and prepares the output accordingly.
> getmerge file system shell command needs error message for user error
> ---------------------------------------------------------------------
>
> Key: HDFS-5740
> URL: https://issues.apache.org/jira/browse/HDFS-5740
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 1.1.2
> Environment: {noformat}[jpfuntner@h58 tmp]$ cat /etc/redhat-release
> Red Hat Enterprise Linux Server release 6.0 (Santiago)
> [jpfuntner@h58 tmp]$ hadoop version
> Hadoop 1.1.2.21
> Subversion -r
> Compiled by jenkins on Thu Jan 10 03:38:39 PST 2013
> From source with checksum ce0aa0de785f572347f1afee69c73861{noformat}
> Reporter: John Pfuntner
> Priority: Minor
>
> I naively tried a {{getmerge}} operation but it didn't seem to do anything
> and there was no error message:
> {noformat}[jpfuntner@h58 tmp]$ hadoop fs -mkdir /user/jpfuntner/tmp
> [jpfuntner@h58 tmp]$ num=0; while [ $num -lt 5 ]; do echo file$num | hadoop
> fs -put - /user/jpfuntner/tmp/file$num; let num=num+1; done
> [jpfuntner@h58 tmp]$ ls -A
> [jpfuntner@h58 tmp]$ hadoop fs -getmerge /user/jpfuntner/tmp/file* files.txt
> [jpfuntner@h58 tmp]$ ls -A
> [jpfuntner@h58 tmp]$ hadoop fs -ls /user/jpfuntner/tmp
> Found 5 items
> -rw------- 3 jpfuntner hdfs 6 2014-01-08 17:37
> /user/jpfuntner/tmp/file0
> -rw------- 3 jpfuntner hdfs 6 2014-01-08 17:37
> /user/jpfuntner/tmp/file1
> -rw------- 3 jpfuntner hdfs 6 2014-01-08 17:37
> /user/jpfuntner/tmp/file2
> -rw------- 3 jpfuntner hdfs 6 2014-01-08 17:37
> /user/jpfuntner/tmp/file3
> -rw------- 3 jpfuntner hdfs 6 2014-01-08 17:37
> /user/jpfuntner/tmp/file4
> [jpfuntner@h58 tmp]$ {noformat}
> It was pointed out to me that I made a mistake and my source should have been
> a directory not a set of regular files. It works if I use the directory:
> {noformat}[jpfuntner@h58 tmp]$ hadoop fs -getmerge /user/jpfuntner/tmp/
> files.txt
> [jpfuntner@h58 tmp]$ ls -A
> files.txt .files.txt.crc
> [jpfuntner@h58 tmp]$ cat files.txt
> file0
> file1
> file2
> file3
> file4
> [jpfuntner@h58 tmp]$ {noformat}
> I think the {{getmerge}} command should issue an error message to let the
> user know they made a mistake.
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