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 <prashant.ii...@gmail.com>: > 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 <boost.subscrib...@gmail.com>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 <prashant.ii...@gmail.com> >> >> > 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 <boost.subscrib...@gmail.com> >> > wrote: >> > >> > > it didn't work. It gave me the Usage information. >> > > >> > > 2011/11/29 hailong.yang1115 <hailong.yang1...@gmail.com> >> > > >> > > > 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: hailong.yang1...@gmail.com >> > > > * 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 <prashant.ii...@gmail.com> >> > > > >> > > > > Try making $HADOOP_CONF point to right classpath including your >> > > > > configuration folder. >> > > > > >> > > > > >> > > > > On Tue, Nov 29, 2011 at 3:58 PM, cat fa < >> boost.subscrib...@gmail.com >> > > >> > > > > 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? >> > > > > > >> > > > > >> > > > >> > > >> > >> >
