[HDFS-15789] Lease renewal does not require namesystem lock

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.3.1, 3.4.0, 3.2.3
• Component/s: hdfs
• Assignee: Jim Brennan
• Reporter: Jim Brennan
• Created: 25/Jan/21 19:48
• Updated: 10/Jun/21 07:44
• Resolved: 28/Jan/21 18:50

Description

daryn found this while testing the performance for HDFS-15704.

The lease manager is independent of the namesystem. Acquiring the lock causes unnecessary lock contention that degrades throughput.