[HBASE-1672] Map tasks not local to RS

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 0.20.0, 0.19.3
• Fix Version/s: 0.20.0
• Component/s: master, regionserver

Environment

DN, TT and RS running on the same nodes.

• Assignee: Unassigned
• Reporter: Amandeep Khurana
• Created: 19/Jul/09 06:26
• Updated: 20/Sep/12 22:10
• Resolved: 24/Jul/09 22:06

Description

The number of data local map tasks while scanning a table is only about 10% of the total map tasks...
My table had 280 regions and 13M records... The number of map tasks in the scan job were equal to the number of regions (280). Only 25 of them were data local tasks.

Issue Links

• is cloned by: HBASE-6111 CLONE - Map tasks not local to RS