Hi, I'm new to this project. I had an issue while stopping the hadoop services after the start. The cluster was up and running. But, when I was about to stop the services i got few errors like this.
hadoop@localhost:/usr/lib/hadoop/conf$ for i in hadoop-namenode > hadoop-datanode hadoop-jobtracker hadoop-tasktracker ; do sudo service $i > stop ; done > Stopping Hadoop namenode daemon: stopping namenode > ERROR. Could not stop Hadoop namenode daemon > Stopping Hadoop datanode daemon: stopping datanode > hadoop-datanode. > Stopping Hadoop jobtracker daemon: stopping jobtracker > ERROR. Could not stop Hadoop jobtracker daemon > Stopping Hadoop tasktracker daemon: stopping tasktracker > ERROR. Could not stop Hadoop tasktracker daemon > hadoop@localhost:/usr/lib/hadoop/conf$ for i in hadoop-namenode > hadoop-datanode hadoop-jobtracker hadoop-tasktracker ; do sudo service $i > stop ; done > Stopping Hadoop namenode daemon: no namenode to stop > hadoop-namenode. > Stopping Hadoop datanode daemon: no datanode to stop > hadoop-datanode. > Stopping Hadoop jobtracker daemon: no jobtracker to stop > hadoop-jobtracker. > Stopping Hadoop tasktracker daemon: no tasktracker to stop > hadoop-tasktracker. > hadoop@localhost:/usr/lib/hadoop/conf$ for i in hadoop-namenode > hadoop-datanode hadoop-jobtracker hadoop-tasktracker ; do sudo service $i > start ; done > Starting Hadoop namenode daemon: starting namenode, logging to > /var/log/hadoop/hadoop-hadoop-namenode-localhost.out > hadoop-namenode. > Starting Hadoop datanode daemon: starting datanode, logging to > /var/log/hadoop/hadoop-hadoop-datanode-localhost.out > hadoop-datanode. > Starting Hadoop jobtracker daemon: starting jobtracker, logging to > /var/log/hadoop/hadoop-hadoop-jobtracker-localhost.out > hadoop-jobtracker. > Starting Hadoop tasktracker daemon: starting tasktracker, logging to > /var/log/hadoop/hadoop-hadoop-tasktracker-localhost.out > hadoop-tasktracker. Am I doing something wrong here? Why was script not able to stop any of the services? Why in the next repeated command it could not find the namenode etc. ? [Meaning, had it already stopped?] How could the start command again work fine? Can Someone let me know what mistakes I'm doing or what might be the issue or why the error? Thank You Very Much! - Regards, Swathi.V. , Software Developer Blog URL :http://femgeekz.blogspot.in
