[HADOOP-13587] distcp.map.bandwidth.mb is overwritten even when -bandwidth flag isn't set

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha2
• Component/s: tools/distcp
• Target Version/s: 3.0.0-alpha2
• Assignee: Zoran Dimitrijevic
• Reporter: Zoran Dimitrijevic
• Created: 07/Sep/16 21:27
• Updated: 12/Sep/16 15:39
• Resolved: 12/Sep/16 15:27

Description

distcp.map.bandwidth.mb exists in distcp-defaults.xml config file, but it is not honored even when it is . Current code always overwrites it with either default value (java const) or with -bandwidth command line option.

The expected behavior (at least how I would expect it) is to honor the value set in distcp-defaults.xml unless user explicitly specify -bandwidth command line flag. If there is no value set in .xml file or as a command line flag, then the constant from java code should be used.

Additionally, I would expect that we also try to get values from distcp-site.xml, similar to other hadoop systems.