[HDFS-16973] RBF: MountTableResolver cache size lookup should take read lock

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: rbf
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Viraj Jasani
• Reporter: Viraj Jasani
• Created: 04/Apr/23 22:03
• Updated: 28/Jan/24 07:09
• Resolved: 05/Apr/23 21:07

Description

Mount table resolver location cache gets invalidated by taking write lock as part of addEntry/removeEntry/refreshEntries calls. Since the write lock exclusively updates the cache, getDestinationForPath already takes read lock before accessing the cache. Similarly, retrieval of the cache size should also take the read lock.

Issue Links

• links to: GitHub Pull Request #5533