[HDFS-12641] Backport HDFS-11755 into branch-2.7 to fix a regression in HDFS-11445

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.7.4
• Target Version/s: 2.7.8
• Assignee: Wei-Chiu Chuang
• Reporter: Wei-Chiu Chuang
• Created: 11/Oct/17 21:08
• Updated: 02/Oct/19 17:15
• Resolved: 18/Jun/19 03:24

Description

Our internal testing caught a regression in HDFS-11445 when we cherry picked the commit into CDH. Basically, it produces bogus missing file warnings. Further analysis revealed that the regression is actually fixed by HDFS-11755.

Because of the order commits are merged in branch-2.8 ~ trunk (HDFS-11755 was committed before HDFS-11445), the regression was never actually surfaced for Hadoop 2.8/3.0.0-(alpha/beta) users. Since branch-2.7 has HDFS-11445 but no HDFS-11755, I suspect the regression is more visible for Hadoop 2.7.4.

I am filing this jira to raise more awareness, than simply backporting HDFS-11755 into branch-2.7.

Issue Links

• is related to: HDFS-11755 Underconstruction blocks can be considered missing