[HBASE-18487] Minor fixes in row lock implementation

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0, 1.3.2, 2.0.0, 1.2.7
• Hadoop Flags: Reviewed
• Assignee: James R. Taylor
• Reporter: James R. Taylor
• Created: 31/Jul/17 18:41
• Updated: 01/Aug/18 06:23
• Resolved: 01/Aug/17 19:41

Description

In reviewing the HRegion.getRowLockInternal() implementation, I noticed a couple of possible issues that I wanted to pass along:

• make sure rowLockContext.cleanUp() always called if row lock could not be acquired
• do not attempt to remove unusable row lock from map multiple times.

I'll post a patch for consideration.