Support site configuration of the bytebuf allocator that Netty will use for
NettyRpcServer channels. Property name is 'hbase.netty.rpcserver.allocator'.
Default is no value, which is equivalent to "pooled". Valid values are:
- "pooled": use PooledByteBufAllocator
- "unpooled": use UnpooledByteBufAllocator
- "heap": use HeapByteBufAllocator, which is a PooledByteBufAllocator that
preferentially allocates buffers on heap wherever possible
- <class>: If the value is none of the recognized labels, treat it as a class
name implementing org.apache.hbase.thirdparty.io.netty.buffer.ByteBufAllocator.
This allows the user to add a custom implementation, perhaps for debugging.
Also updates ReflectionUtils with a new helper method.
Signed-off-by: Viraj Jasani <vjasani@apache.org>
Conflicts:
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/NettyRpcServer.java
hbase-server/src/test/java/org/apache/hadoop/hbase/ipc/TestNettyRpcServer.java
da76941b0e