瀏覽代碼
HADOOP-3254. Restructure internal namenode methods that process
heartbeats to use well-defined BlockCommand object(s) instead of
using the base java Object. (Tsz Wo (Nicholas), SZE via dhruba)
git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@648382 13f79535-47bb-0310-9956-ffa450edef68