[HBASE-10427] clean up HRegionLocation/ServerName usage

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.99.0
• Assignee: Sergey Shelukhin
• Reporter: Sergey Shelukhin
• Created: 27/Jan/14 22:07
• Updated: 21/Feb/15 23:29
• Resolved: 29/Jan/14 19:14

Description

I noticed that AsyncProcess updates cache location on failures using a single HRL object that is key to the map that is intended to be by server and contains requests for multiple regions (i.e. MultiAction contains requests for regions A, B, C, and sits in a map by HRL with HRL from server A as a key; in case of failure for e.g. request to B, or entire multiaction, the location from map key will be passed to updateCache... methods, even though it's not for the correct region). It may cause some subtle mistakes in cache updates.
I think it'd be good to clean up HRL usage around AP and other classes - if we intend to have a server name, then we should use ServerName not HRL.