[HADOOP-8140] dfs -getmerge should process its argments better

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.23.2
• Assignee: Daryn Sharp
• Reporter: arkady borkovsky
• Created: 09/Feb/07 02:11
• Updated: 23/Mar/12 20:53
• Resolved: 06/Mar/12 22:48

Description

The command only works if its argument is a directory
If the argement is a file or a wildcard, it does nothing without any message.
If not arguments are given, the command fails with a stack dump.

The improved version should:
– produce an error message in case it cannot perform meaningful action (no argument, or no matching files)
– copy the files specified by a wildcard expresstion. (A single file is special case of this).

Issue Links

• is duplicated by: HADOOP-6387 FsShell -getmerge source file pattern is broken
• relates to: HADOOP-8179 risk of NPE in CopyCommands processArguments()
• supercedes: HADOOP-7447 Add a warning message for FsShell -getmerge when the src path is no a directory
• supercedes: HDFS-2146 Add a test for FsShell -getmerge when the src path is no a directory