HADOOP-6949 introduced a very important optimization to the RPC layer. Based on the benchmarks presented in HDFS-1583 this provides an order of magnitude improvement of current RPC implementation. RPC is a common component of Hadoop projects. Many of them should benefit from this change. But since this is an incompatible change it requires a vote to be included into a previous branch. Please vote for inclusion of this change into branch 0.22.
+1 from me. Thanks, --Konstantin
