[HDFS-13926] ThreadLocal aggregations for FileSystem.Statistics are incorrect with striped reads

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.2.0, 3.0.4, 3.1.2
• Component/s: erasure-coding
• Target Version/s: 3.0.4
• Hadoop Flags: Reviewed
• Assignee: Hrishikesh Gadre
• Reporter: Xiao Chen
• Created: 18/Sep/18 03:37
• Updated: 10/Oct/18 02:55
• Resolved: 10/Oct/18 02:55

Description

During some integration testing, Nihar Sheth found out that per-thread read stats for EC is incorrect. This is due to the striped reads are done asynchronously on the worker threads.