Hello Mohammad, Which version of the codebase?
If it's trunk or branch-2, then for the datanode side, I recommend starting from hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java. Look for a method named sendHeartBeat. On the namenode side, look at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java. Look for a method named sendHeartbeat. (Notice the slight difference in capitalization of letter 'b'.) If it's a different branch, let me know, and I'd be happy to provide help on the specifics of that branch. Hope this helps, --Chris On Wed, Apr 10, 2013 at 11:03 PM, Mohammad Mustaqeem <3m.mustaq...@gmail.com > wrote: > Which java code(file) generates the heartbeat from the datanode and > which code(file) listen that heartbeat on the namenode? > -- > *With regards ---* > *Mohammad Mustaqeem*, > M.Tech (CSE) > MNNIT Allahabad > 9026604270 >
