unable to start name node service . hdfs format done succesfull   [root@master conf]# for x in `cd /etc/init.d ; ls hadoop-hdfs-*` ; do service $x start ; done starting namenode, logging to /var/log/hadoop-hdfs/hadoop-hdfs-namenode-master.cluster.com.out Failed to start Hadoop namenode. Return value: 1 [FAILED] [root@master conf]# cat /var/log/hadoop-hdfs/hadoop-hdfs-namenode-master.cluster.com.out ulimit -a for user hdfs core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 7336 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 32768 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 65536 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited ... View more