[HADOOP-18582] No need to clean tmp files in distcp direct mode

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.4
• Fix Version/s: 3.4.0, 3.3.6
• Component/s: tools/distcp
• Labels: pull-request-available
• Target Version/s: 3.4.0, 3.3.6
• Hadoop Flags: Reviewed
• Assignee: 10000kang
• Reporter: 10000kang
• Created: 21/Dec/22 04:33
• Updated: 27/Jan/24 08:52
• Resolved: 23/Feb/23 04:51

Description

it not necessary to do `cleanupTempFiles`  while ditcp commit job in direct  mode, because it there is no temp files in direct mode.

This clean operation will increase the task execution time, because it will get the list of files in the target path. When the number of files in the target path is very large, this operation will be very slow.

note there are two patches which need to be cherrypicked when picking this up; the original patch and a followup, both with HADOOP-18582 in the title

3b7b79b37ae HADOOP-18582. skip unnecessary cleanup logic in distcp (#5251)
e8a6b2c2c4e HADOOP-18582. Addendum: Skip unnecessary cleanup logic in DistCp.

Issue Links

• links to: GitHub Pull Request #5251
• links to: GitHub Pull Request #5409