Hi i have two questions regarding hdfs and jps utility I am new to Hadoop and started leraning hadoop from the past week
1.when ever i start start-all.sh and jps in console it showing the processes started *naidu@naidu:~/work/hadoop-1.0.4/bin$ jps* *22283 NameNode* *23516 TaskTracker* *26711 Jps* *22541 DataNode* *23255 JobTracker* *22813 SecondaryNameNode* *Could not synchronize with target* But along with the list of process stared it always showing *" Could not synchronize with target" *in the jps output. What is meant by "Could not synchronize with target"? Can some one explain why this is happening? 2.Is it possible to format namenode multiple times? When i enter the namenode -format command, it not formatting the name node and showing the following ouput. *naidu@naidu:~/work/hadoop-1.0.4/bin$ hadoop namenode -format* *Warning: $HADOOP_HOME is deprecated.* * * *13/05/01 12:08:04 INFO namenode.NameNode: STARTUP_MSG: * */************************************************************* *STARTUP_MSG: Starting NameNode* *STARTUP_MSG: host = naidu/127.0.0.1* *STARTUP_MSG: args = [-format]* *STARTUP_MSG: version = 1.0.4* *STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0 -r 1393290; compiled by 'hortonfo' on Wed Oct 3 05:13:58 UTC 2012* *************************************************************/* *Re-format filesystem in /home/naidu/dfs/namenode ? (Y or N) y* *Format aborted in /home/naidu/dfs/namenode* *13/05/01 12:08:05 INFO namenode.NameNode: SHUTDOWN_MSG: * */************************************************************* *SHUTDOWN_MSG: Shutting down NameNode at naidu/127.0.0.1* * * *************************************************************/* Can someone help me in understanding this? Why is it not possible to format name node multiple times? On Wed, May 1, 2013 at 9:47 AM, Cheolsoo Park <piaozhe...@gmail.com> wrote: > Please see the following wiki page: > https://cwiki.apache.org/confluence/display/PIG/HowToContribute > > Thanks, > Cheolsoo > > > On Tue, Apr 30, 2013 at 9:10 PM, Naidu MS > <sanyasinaidu.malla...@gmail.com>wrote: > > > Hi How to get the source of pig? > > I am interested in going to source code so that i can learn how the > > framework is written. > > I can help in fixing some minor bugs/jira issues. > > Can some one help me how to get the source code ? > > > > > > > > Regards, > > Naidu > > > > > > On Wed, May 1, 2013 at 9:30 AM, Cheolsoo Park <piaozhe...@gmail.com> > > wrote: > > > > > Welcome to Pig. There are hundreds of open jiras: > > > > > > > > > > > > https://issues.apache.org/jira/issues/?jql=project%20%3D%20PIG%20AND%20status%20%3D%20Open%20ORDER%20BY%20created%20DESC%2C%20priority%20DESC > > > > > > Please feel free to submit patches. > > > > > > Thanks, > > > Cheolsoo > > > > > > > > > > > > On Tue, Apr 30, 2013 at 4:16 PM, Vineet Nair <to.vrn...@gmail.com> > > wrote: > > > > > > > Hello all , > > > > > > > > I was just going through the source code of Pig and I would very much > > > like > > > > to contribute to it. > > > > I was just wondering if there are any small Jira requests that i can > > > start > > > > working on. > > > > > > > > Thanks and regards, > > > > Vineet > > > > > > > > > >
