[HDFS-16511] Improve lock type for ReplicaMap under fine-grain lock mode.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: hdfs
• Labels: pull-request-available
• Hadoop Flags: Reviewed
• Flags: Important
• Assignee: Mingxiang Li
• Reporter: Mingxiang Li
• Created: 19/Mar/22 12:42
• Updated: 21/Jan/24 12:20
• Resolved: 31/Mar/22 06:02

Description

In HDFS-16429 we make LightWeightResizableGSet to be thread safe, and  In HDFS-15382 we have split lock to block pool grain locks.After these improvement, we can change some method to acquire read lock replace to acquire write lock.

Issue Links

• links to: GitHub Pull Request #4085
• links to: https://github.com/apache/hadoop/pull/4085