[HBASE-3401] Region IPC operations should be high priority

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.90.1
• Fix Version/s: 0.90.0
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 30/Dec/10 19:55
• Updated: 20/Nov/15 12:43
• Resolved: 06/Jan/11 19:51

Description

I manufactured an imbalanced cluster so one region server had 300 regions and the others had very few. I then ran balancer while hitting the high-load region server with YCSB. I observed that the rate of load shedding was VERY slow since the closeRegion IPCs were getting stuck at the back of the IPC queue.

All of these important master->RS RPC calls should be set to high priority.