Issue of Old Namenode Namenode is SPOF(Single Point of Failure) Purpose of Namenode HighAvaliability Easy Sync Active/ Slave Easy Deployment No SPOF Hadoop Cluster Economically What is Namenode HA? By Apache Hadoop2.0 Included CDH4.1

MapReduce Total cumulative CPU time: 33 seconds 380 msec Ended Job = job_201308291142_4635 with errors Error during job, obtaining debugging information... Job Tracking URL: http://xxx /jobdetails.jsp?jobid=job_201308291142_4635 Examining …