Thank you for your help.
I can use /sbin/hadoop-daemon.sh {start|stop} {service} script to start a
namenode, but I can't start a resourcemanager.2011/11/30 Harsh J <[email protected]> > I simply use the /sbin/hadoop-daemon.sh {start|stop} {service} script > to control daemons at my end. > > Does this not work for you? Or perhaps this thread is more about > documenting that? > > 2011/11/30 Nitin Khandelwal <[email protected]>: > > Hi, > > > > Even i am facing the same problem. There may be some issue with script . > > The doc says to start namenode type : > > bin/hdfs namenode start > > > > But "start" is not recognized. There is a hack to start namenode with > > command "bin/hdfs namenode &" , but no idea how to stop. > > If it had been a issue with config , the later also should not have > worked. > > > > Thanks, > > Nitin > > > > > > 2011/11/30 cat fa <[email protected]> > > > >> In fact it's me to say sorry. I used the word "install" which was > >> misleading. > >> > >> In fact I downloaded a tar file and extracted it to ／usr／bin／hadoop > >> > >> Could you please tell me where to point those variables？ > >> > >> 2011/11/30, Prashant Sharma <[email protected]>: > >> > I am sorry, I had no idea you have done a rpm install, my suggestion > was > >> > based on the assumption that you have done a tar extract install where > >> all > >> > three distribution have to extracted and then export variables. > >> > Also I have no experience with rpm based installs - so no comments > about > >> > what went wrong in your case. > >> > > >> > Basically from the error i can say that it is not able to find the > jars > >> > needed on classpath which is referred by scripts through > >> > HADOOP_COMMON_HOME. I would say check with the access permission as in > >> > which user was it installed with and which user is it running with ? > >> > > >> > On Tue, Nov 29, 2011 at 10:48 PM, cat fa <[email protected] > >> >wrote: > >> > > >> >> Thank you for your help, but I'm still a little confused. > >> >> Suppose I installed hadoop in /usr/bin/hadoop/ .Should I > >> >> point HADOOP_COMMON_HOME to /usr/bin/hadoop ? Where should I > >> >> point HADOOP_HDFS_HOME? Also to /usr/bin/hadoop/ ? > >> >> > >> >> 2011/11/30 Prashant Sharma <[email protected]> > >> >> > >> >> > I mean, you have to export the variables > >> >> > > >> >> > export HADOOP_CONF_DIR=/path/to/your/configdirectory. > >> >> > > >> >> > also export HADOOP_HDFS_HOME ,HADOOP_COMMON_HOME. before your run > your > >> >> > command. I suppose this should fix the problem. > >> >> > -P > >> >> > > >> >> > On Tue, Nov 29, 2011 at 6:23 PM, cat fa < > [email protected]> > >> >> > wrote: > >> >> > > >> >> > > it didn't work. It gave me the Usage information. > >> >> > > > >> >> > > 2011/11/29 hailong.yang1115 <[email protected]> > >> >> > > > >> >> > > > Try $HADOOP_PREFIX_HOME/bin/hdfs namenode stop --config > >> >> > $HADOOP_CONF_DIR > >> >> > > > and $HADOOP_PREFIX_HOME/bin/hdfs datanode stop --config > >> >> > $HADOOP_CONF_DIR. > >> >> > > > It would stop namenode and datanode separately. > >> >> > > > The HADOOP_CONF_DIR is the directory where you store your > >> >> configuration > >> >> > > > files. > >> >> > > > Hailong > >> >> > > > > >> >> > > > > >> >> > > > > >> >> > > > > >> >> > > > *********************************************** > >> >> > > > * Hailong Yang, PhD. Candidate > >> >> > > > * Sino-German Joint Software Institute, > >> >> > > > * School of Computer Science&Engineering, Beihang University > >> >> > > > * Phone: (86-010)82315908 > >> >> > > > * Email: [email protected] > >> >> > > > * Address: G413, New Main Building in Beihang University, > >> >> > > > * No.37 XueYuan Road,HaiDian District, > >> >> > > > * Beijing,P.R.China,100191 > >> >> > > > *********************************************** > >> >> > > > > >> >> > > > From: cat fa > >> >> > > > Date: 2011-11-29 20:22 > >> >> > > > To: common-user > >> >> > > > Subject: Re: [help]how to stop HDFS > >> >> > > > use $HADOOP_CONF or $HADOOP_CONF_DIR ? I'm using hadoop 0.23. > >> >> > > > > >> >> > > > you mean which class? the class of hadoop or of java? > >> >> > > > > >> >> > > > 2011/11/29 Prashant Sharma <[email protected]> > >> >> > > > > >> >> > > > > Try making $HADOOP_CONF point to right classpath including > your > >> >> > > > > configuration folder. > >> >> > > > > > >> >> > > > > > >> >> > > > > On Tue, Nov 29, 2011 at 3:58 PM, cat fa < > >> >> [email protected] > >> >> > > > >> >> > > > > wrote: > >> >> > > > > > >> >> > > > > > I used the command : > >> >> > > > > > > >> >> > > > > > $HADOOP_PREFIX_HOME/bin/hdfs start namenode --config > >> >> > $HADOOP_CONF_DIR > >> >> > > > > > > >> >> > > > > > to sart HDFS. > >> >> > > > > > > >> >> > > > > > This command is in Hadoop document (here > >> >> > > > > > < > >> >> > > > > > > >> >> > > > > > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/ClusterSetup.html > >> >> > > > > > >) > >> >> > > > > > > >> >> > > > > > However, I got errors as > >> >> > > > > > > >> >> > > > > > Exception in thread "main" > >> java.lang.NoClassDefFoundError:start > >> >> > > > > > > >> >> > > > > > Could anyone tell me how to start and stop HDFS? > >> >> > > > > > > >> >> > > > > > By the way, how to set Gmail so that it doesn't top post my > >> >> reply? > >> >> > > > > > > >> >> > > > > > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > > >> > > > > > > > > -- > > > > > > Nitin Khandelwal > > > > > > -- > Harsh J >
