[HBASE-9987] Remove some synchronisation points in HConnectionManager

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.0, 0.96.0
• Fix Version/s: 0.98.0, 0.96.1
• Component/s: Client
• Hadoop Flags: Reviewed
• Assignee: Nicolas Liochon
• Reporter: Nicolas Liochon
• Created: 17/Nov/13 13:01
• Updated: 18/Dec/13 22:57
• Resolved: 18/Nov/13 15:09

Description

Change a Map to a concurrentMap
Removed the "cachedServer (introduced in HBASE-4785). I suspect that this function is not needed anymore as we also have a list of dead servers, and accessing the list is not blocking. I will dig into this more however.

The patch gives a 10% improvement with the NoClusterClient.