[HBASE-15478] add comments to FSHLog explaining why syncRunnerIndex won't overflow

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0, 1.0.3, 1.1.3, 2.0.0
• Fix Version/s: 1.3.0, 1.2.1, 1.0.4, 1.1.5, 2.0.0
• Component/s: wal
• Assignee: Sean Busbey
• Reporter: Sean Busbey
• Created: 17/Mar/16 20:04
• Updated: 09/Nov/17 00:19
• Resolved: 21/Mar/16 05:41

Description

A comment near the fix for HBASE-14759 will make the code easier for folks to follow later down the road.