Not sure why it didn't get backported in 2.x before, but looks like a good improvement overall.
- relates to
-
HDFS-7060 Avoid taking locks when sending heartbeats from the DataNode
-
- Resolved
-
Not sure why it didn't get backported in 2.x before, but looks like a good improvement overall.
HDFS-7060
Avoid taking locks when sending heartbeats from the DataNode