Hi Martinus, While you can run the two instances of Hadoop on the same machine, you'll need to reconfigure the listening ports for MR/HDFS and the webapps to run on different ports.
The easier way to Hadoop as a different user is: - stop current Hadoop instance - su as the intended user - re-install Hadoop and reformat a namenode under the same user. I've tried to perform chown to my existing Hadoop installation. It had some permission problems; but didn't really bother to troubleshoot as I didn't have data in the data nodes. So I did a fresh install like above. Thanks. On Thu, Jan 19, 2012 at 10:06 AM, Martinus Martinus <martinus...@gmail.com> wrote: > Hi Mohamed, > > Thanks for your suggestion, but how do we moved the ownership of our hadoop > installation from root to another user account? and can we install two > different versions of hadoop on the same machine? > > Thanks. > > > On Wed, Jan 18, 2012 at 8:30 PM, Mohamed Elsayed > <mohammed.elsay...@bibalex.org> wrote: >> >> Run hadoop using Martinus account, not root account. It will work well >> with you. If there is anything wrong with you, don't hesitate to write it >> here. Thank you. >> >> Mohamed Elsayed >> Bibliotheca Alexandrina >> >> >> On 01/18/2012 01:16 PM, Martinus Martinus wrote: >> >> Hi Mohamed, >> >> Please find attached the namenode log. >> >> Thanks. >> >> On Wed, Jan 18, 2012 at 7:02 PM, Mohamed Elsayed >> <mohammed.elsay...@bibalex.org> wrote: >>> >>> Hi Martinus, >>> >>> Do you think you could attach namenode's log file to find out where is >>> the problem? Thank you. >>> >>> Mohamed Elsayed >>> Bibliotheca Alexandrina >>> >>> >>> On 01/18/2012 11:14 AM, Martinus Martinus wrote: >>> >>> Hi Mohamed, >>> >>> Thanks for your explanation. I still have the same problem as before. do >>> you have any other suggestion? >>> >>> Thanks. >>> >>> On Wed, Jan 18, 2012 at 4:52 PM, Mohamed Elsayed >>> <mohammed.elsay...@bibalex.org> wrote: >>>> >>>> The core is locating bin/java. If you execute ls -l >>>> /usr/lib/jvm/java-6-sun/bin, you will notice bin/java is a symbolic link to >>>> jre/bin/java. So both of them are the same. Don't worry about that. >>>> >>>> Mohamed Elsayed >>>> Bibliotheca Alexandrina >>>> >>>> >>>> On 01/18/2012 10:25 AM, Martinus Martinus wrote: >>>> >>>> Hi Mohamed, >>>> >>>> Thanks for your answer. I have setup it before into something like this >>>> : >>>> >>>> JAVA_HOME=/usr/lib/jvm/java-6-sun >>>> >>>> I don't know if that's should be the same or will it gave a different >>>> result. I'll try it first. >>>> >>>> Thanks. >>>> >>>> On Wed, Jan 18, 2012 at 3:53 PM, Mohamed Elsayed >>>> <mohammed.elsay...@bibalex.org> wrote: >>>>> >>>>> Hi Martinus, >>>>> >>>>> As I remember, I started again from scratch and erased everything >>>>> related to hadoop in my machine. In my first run, there was an error >>>>> message >>>>> (related to java) displayed after executing bin/hadoop namenode -format. >>>>> This message didn't appear in my second run. So I believe your problem is >>>>> in >>>>> this point. Keep you eyes on what is happening after executing this >>>>> command. >>>>> FYI, you must set JAVA_HOME in conf/hadoop-env.sh by doing the following: >>>>> >>>>> file `which java` >>>>> file /etc/alternatives/java >>>>> JAVA_HOME=/usr/lib/jvm/java-6-openjdk/jre >>>>> >>>>> If you still can't run the example, try to set HADOOP_CLASSPATH in >>>>> conf/hadoop-env.sh to the example's path e.g. >>>>> HADOOP_CLASSPATH=../hadoop-0.20.203.0/hadoop-examples-0.20.203.0.jar. But >>>>> this variable is not necessary to fill. >>>>> >>>>> If there is any error messages appeared after executing any command, >>>>> try to fix or write them here. I will try to help If I can. >>>>> >>>>> Mohamed Elsayed >>>>> Bibliotheca Alexandrina >>>>> >>>>> >>>>> On 01/18/2012 04:28 AM, Martinus Martinus wrote: >>>>> >>>>> Hi Mohamed, >>>>> >>>>> Did you found out how to handle this thing? Because when I run the >>>>> hadoop-0.20.2-example.jar wordcount input output it just run, but it >>>>> didn't >>>>> gave any log message and it won't stop running. >>>>> >>>>> Thanks. >>>>> >>>>> On Tue, Jan 17, 2012 at 7:29 PM, Mohamed Elsayed >>>>> <mohammed.elsay...@bibalex.org> wrote: >>>>>> >>>>>> Your case happened to me in the past. In first try to start again from >>>>>> scratch and be sure that everything is going well (working well e.g. >>>>>> namenode is working and there is no java error) specifically after >>>>>> executing >>>>>> bin/hadoop namenode -format. If you faced any hassles, don't hesitate to >>>>>> state them here. >>>>>> >>>>>> Mohamed Elsayed >>>>>> Bibliotheca Alexandrina >>>>>> >>>>>> >>>>>> On 01/16/2012 04:52 AM, Martinus Martinus wrote: >>>>>> >>>>>> Hi Harsh, >>>>>> >>>>>> I just reinstalled my master node again and it's worked right now. But >>>>>> when I tried to run the example using command bin/hadoop jar >>>>>> hadoop-0.20.2-examples.jar wordcount input output, it just waiting and >>>>>> didn't gave me anything and didn't stop either. >>>>>> >>>>>> Thanks. >>>>>> >>>>>> On Fri, Jan 13, 2012 at 8:22 PM, Harsh J <ha...@cloudera.com> wrote: >>>>>>> >>>>>>> What does the NameNode log in $HADOOP_HOME/logs/hadoop-*namenode*.log >>>>>>> carry? >>>>>>> >>>>>>> On 13-Jan-2012, at 4:05 PM, Martinus Martinus wrote: >>>>>>> >>>>>>> > Hi, >>>>>>> > >>>>>>> > I start-all.sh my hadoop master node, but I can't find any namenode >>>>>>> > on it. Would anyone be so kindly to tell me how to fix this problem? >>>>>>> > >>>>>>> > Thanks. >>>>>>> >>>>>> >>>>> >>>> >>> >> >
