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Я установил hadoop на ubuntu 13.10, но когда я запускаю все демоны с помощью «start-all.sh «. Запускается только вторичный namenode. И это показано на экране.

 starting namenode, logging to /home/shubham/Downloads/hadoop-1.2.1/libexec/../logs/hadoop-shubham-namenode-shubham-pc.out
localhost: starting datanode, logging to /home/shubham/Downloads/hadoop-1.2.1/libexec/../logs/hadoop-shubham-datanode-shubham-pc.out
localhost: secondarynamenode running as process 9580. Stop it first.
starting jobtracker, logging to /home/shubham/Downloads/hadoop-1.2.1/libexec/../logs/hadoop-shubham-jobtracker-shubham-pc.out
Error: Could not find or load main class export
localhost: starting tasktracker, logging to /home/shubham/Downloads/hadoop-1.2.1/libexec/../logs/hadoop-shubham-tasktracker-shubham-pc.out