Please be sure to use different HADOOP_CONF_DIR for the two version; and also in the configuration, be sure to use different folder to store the HDFS related files;
Regards, *Stanley Shi,* On Tue, May 6, 2014 at 8:41 AM, Shengjun Xin <s...@gopivotal.com> wrote: > According to your description, I think it is still a configuration > problem. Before you run hadoop command, did you check the hadoop version > and hadoop environment variables ? Are they what you want? > > > On Mon, May 5, 2014 at 11:42 PM, chandra kant < > chandralakshmikan...@gmail.com> wrote: > >> I mean , I tried that already. In my .bash_profile , I set up >> HADOOP_HOME, HADOOP_MAPRED_HOME, HADOOP_COMMON_HOME, HADOOP_HDFS_HOME, >> HADOOP_YARN_HOME, HADOOP_CONF_DIR to point to hadoop2 directory. And >> similarly I have HADOOP_PREFIX and HADOOP_HOME for hadoop-1. >> So , i comment out hadoop-2 specific conf lines in .bash_profile while >> running hadoop-1 and vice-versa. >> And here the problem comes, that when trying to run hadoop-2 , it asks to >> format the hadoop.tmp.dir set up by hadoop-1. >> >> Just for context- I have done fair amount of work on hadoop-1 and this is >> my first attempt at hadoop-2. >> >> -- >> Chandra >> >> >> On Mon, May 5, 2014 at 11:31 AM, chandra kant < >> chandralakshmikan...@gmail.com> wrote: >> >>> Thanks.. >>> I set it accordingly.. >>> >>> >>> On Monday, 5 May 2014, Shengjun Xin <s...@gopivotal.com> wrote: >>> >>>> I think you need to set two different environment variables for hadoop1 >>>> and hadoop2, such as HADOOP_HOME, HADOOP_CONF_DIR and before you run hadoop >>>> command, you need to make sure the correct environment variables are >>>> enable. >>>> >>>> >>>> On Mon, May 5, 2014 at 12:36 PM, chandra kant < >>>> chandralakshmikan...@gmail.com> wrote: >>>> >>>>> >>>>> Hi, >>>>> Is it possible to install both hadoop1 and hadoop2 side by side on >>>>> single node for development purpose so that I can choose any one of them >>>>> by >>>>> just shutting down one and starting another? >>>>> I installed hadoop 1.2.1 and ran air successfully. >>>>> Next, when I try to do "hdfs namenode - format " from hadoop2.2.0 , it >>>>> tries to format the hadoop.tmp.dir set up by hadoop1.2.1 , which is >>>>> clearly >>>>> not desirable. I set up "dfs.namenode.name.dir" and >>>>> "dfs.datanode.data.dir" >>>>> in "hdfs-site.xml" to different >>>>> locations. >>>>> But again the same problem... >>>>> Any suggestions.... >>>>> >>>>> -- >>>>> Chandra >>>>> >>>>> >>>> >>>> >>>> -- >>>> Regards >>>> Shengjun >>>> >>> >> > > > -- > Regards > Shengjun >
