[HDFS-11378] Verify multiple DataNodes can be decommissioned/maintenance at the same time

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.9.0, 3.0.0-alpha4
• Component/s: hdfs
• Target Version/s: 3.0.0-alpha4
• Hadoop Flags: Reviewed
• Assignee: Manoj Govindassamy
• Reporter: Manoj Govindassamy
• Created: 27/Jan/17 02:59
• Updated: 29/Jan/17 19:20
• Resolved: 29/Jan/17 19:20

Description

DecommissionManager is capable of transitioning multiple DataNodes to Decommission/Maintenance states. Current tests under TestDecommission and TestMaintenanceState only request for one DataNode for Decommission/Maintenance. Better if we can simulate real world cases whereby multiple DataNodes can be taken out of service and verify the resulting block replication factor for the files.