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Pig >> mail # dev >> Want to contribute


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Vineet Nair 2013-04-30, 23:16
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Cheolsoo Park 2013-05-01, 04:00
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Naidu MS 2013-05-01, 04:10
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Cheolsoo Park 2013-05-01, 04:17
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Naidu MS 2013-05-01, 07:25
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Re: Want to contribute
Hi, Naidu,
Those are Hadoop question and you should send to [EMAIL PROTECTED]. A
quick answer to double "hadoop namenode -format" question is, once you do
that, you lose the metadata, you would have trouble getting hdfs files back.

Thanks,
Daniel
On Wed, May 1, 2013 at 12:25 AM, Naidu MS
<[EMAIL PROTECTED]>wrote:

> 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 <[EMAIL PROTECTED]>
> 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
> > <[EMAIL PROTECTED]>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 <[EMAIL PROTECTED]>
> > > 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 <[EMAIL PROTECTED]>
> > > 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
> > > > >
> > > >
> > >
> >
>
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Naidu MS 2013-05-02, 03:16