[HDFS-16767] RBF: Support observer node from Router-Based Federation

• Type: Sub-task
• 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: Simbarashe Dzinamarira
• Reporter: Simbarashe Dzinamarira
• Created: 09/Sep/22 23:29
• Updated: 28/Jan/24 08:07
• Resolved: 14/Sep/22 23:12

Description

Enable routers to direct read calls to observer namenodes.

Issue Links

• is related to: HDFS-16889 Backport JIRAs related to RBF SBN to branch-3.3
• split from: HDFS-13522 HDFS-13522: Add federated nameservices states to client protocol and propagate it between routers and clients.
• links to: GitHub Pull Request #4127