[HBASE-2535] split hostname format should be consistent with tasktracker for locality

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.20.4
• Component/s: mapreduce
• Assignee: Unassigned
• Reporter: John Sichi
• Created: 12/May/10 03:13
• Updated: 11/Jun/22 23:33
• Resolved: 16/Nov/16 19:58

Description

I was running a mapreduce job (via Hive) against HBase, and noticed that I wasn't getting any locality (the input split location and the task tracker machine in the job tracker UI were always different, and "Rack-local map tasks" in the job counters was 0).

I tracked this down to a discrepancy in the way hostnames were being compared.

The task tracker detail had a Host like

/f/s/1.2.3.4/h.s.f.com.

(with trailing dot)

But the Input Split Location had

/f/s/1.2.3.4/h.s.f.com

(without trailing dot)

Issue Links

• duplicates: HBASE-7693 Hostname returned by TableInputFormatBase.reverseDNS contains trailing period