[SPARK-2625] Fix ShuffleReadMetrics for NettyBlockFetcherIterator

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Component/s: Shuffle, Spark Core
• Target Version/s: 1.1.0
• Assignee: Reynold Xin
• Reporter: Sandy Ryza
• Created: 22/Jul/14 18:36
• Updated: 15/Aug/14 05:08
• Resolved: 15/Aug/14 05:08

Description

NettyBlockFetcherIterator doesn't report fetchWaitTime and has some race conditions where multiple threads can be incrementing bytes read at the same time.