[HBASE-12684] Add new AsyncRpcClient

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0, 2.0.0
• Component/s: Client
• Hadoop Flags: Incompatible change, Reviewed

Release Note

Retrofit a new, netty-based rpc transport on the client. This client is slightly slower if little contention given the extra tier or so that netty adds and that we block on a Future waiting on the call to finish. This client opens the way for HBase having a native Async API.

This client is on by default in master branch (2.0 hbase). It is off in branch-1.0 (hbase-1.1.x). To enable it, set "hbase.rpc.client.impl" to "org.apache.hadoop.hbase.ipc.AsyncRpcClient"

• Assignee: Jurriaan Mous
• Reporter: Jurriaan Mous
• Created: 14/Dec/14 11:09
• Updated: 03/Jun/15 15:29
• Resolved: 25/Jan/15 02:26

Description

With the changes in HBASE-12597 it is possible to add new RpcClients. This issue is about adding a new Async RpcClient which would enable HBase to do non blocking protobuf service communication.

Besides delivering a new AsyncRpcClient I would also like to ask the question what it would take to replace the current RpcClient? This would enable to simplify async code in some next issues.