[HDFS-17052] Improve BlockPlacementPolicyRackFaultTolerant to avoid choose nodes failed when no enough Rack.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: namenode
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Hualong Zhang
• Reporter: Hualong Zhang
• Created: 16/Jun/23 07:43
• Updated: 16/Oct/24 18:29
• Resolved: 02/Jul/23 07:40

Description

When writing EC data, if the number of racks matching the storageType is insufficient, more than one block are allowed to be written to the same rack

 

 

 

However, during EC block recovery, it is not possible to recover on the same rack, which deviates from the expected behavior.

Issue Links

• links to: GitHub Pull Request #5759