[HDFS-16761] Namenode UI for Datanodes page not loading if any data node is down

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.2
• Fix Version/s: 3.4.0
• Component/s: namenode, ui
• Labels: pull-request-available
• Target Version/s: 3.2.2, 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Zita Dombi Assign to me
• Reporter: Krishna Reddy
• Created: 06/Sep/22 16:45
• Updated: 27/Jan/24 01:15
• Resolved: 16/Feb/23 17:56

Description

Steps to reproduce:

• Install the hadoop components and add 3 datanodes

• Enable namenode HA 

• Open Namenode UI and check datanode page 

• check all datanodes will display

• Now make one datanode down

• wait for 10 minutes time as heartbeat expires

• Refresh namenode page and check

 

Actual Result: It is showing error message "NameNode is still loading. Redirecting to the Startup Progress page."

Issue Links

• is caused by: HDFS-16203 Discover datanodes with unbalanced block pool usage by the standard deviation
• links to: GitHub Pull Request #5390