[HBASE-18102] [SHELL] Purge close_region command that allows by-pass of Master

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Operability, shell
• Assignee: Apekshit Sharma
• Reporter: Michael Stack
• Created: 24/May/17 22:55
• Updated: 17/Jun/22 18:10
• Resolved: 03/Aug/17 01:12

Description

In AMv2, if a RS is not aligned with Master notions of how the world is, then the Master will kill the deviant RS (TODO: is forcing compliance via less radical means – but that is how it is currently).

The shell currently allows by-passing the Master to make cluster modifications such as our being able to send a close directly to a RegionServer for it to execute locally. This facility was used in the past to do fix-up when Master lost account of Region locations. In the new regime, such mis-accounting should no longer happen and, should a user mistakenly do an explicit close against a RS, the consequences will be more than the user bargained for; the Master will shut down the RS as soon as it reports close of a Region the master thinks should be open (No independence allowed!).

This issue is to review shell Region and Table manipulation commands to purge those that by-pass Master or at least to add big warning.

Issue Links

• is blocked by: HBASE-18231 Deprecate and throw unsupported operation when Admin#closeRegion is called.