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From "Eason.Lee" <leongf...@gmail.com>
Subject Re: Namenode problem
Date Tue, 09 Mar 2010 03:39:19 GMT
2010/3/9 William Kang <weliam.cloud@gmail.com>

> Hi Eason,
> Thanks a lot for your reply. But I do have another folder which in not
> inside /tmp. I did not use default settings.
>

you'd better post your configuration in detail~~


> To make it clear, I will describe what happened:
> 1. hadoop namenode -format
> 2. start-all.sh
> 3. running fine, http://localhost:50070 is accessible
> 4. stop-all.sh
> 5. start-all.sh, http://localhost:50070 is NOT accessible
> Unless I format the namenode, the HDFS master
> http://localhost:50070/dfshealth.jsp is not accessible.
>

Try "jps" to see if the namenode is up~~
If the namenode is not up, maybe there is some error log in logdir, try to
post the error~~


> So, I have to redo step 1, 2 again to gain access to
> http://localhost:50070/dfshealth.jsp. But all data would be lost after
> format.
>

format will delete the old namespace, so everything will lost~~


>
>
> William
>
> On Mon, Mar 8, 2010 at 1:02 AM, Eason.Lee <leongfans@gmail.com> wrote:
>
> > 2010/3/8 William Kang <weliam.cloud@gmail.com>
> >
> > > Hi guys,
> > > Thanks for your replies. I did not put anything in /tmp. It's just that
> > >
> >
> > default setting of dfs.name.dir/dfs.data.dir is set to the subdir in /tmp
> >
> > every time when I restart the hadoop, the localhost:50070 does not show
> up.
> > > The localhost:50030 is fine. Unless I reformat namenode, I wont be able
> > to
> > > see the HDFS' web page at 50070. It did not clean /tmp automatically.
> But
> > >
> >
> > It's not you clean the /tmp dir. Some operation clean it automatically~~
> >
> >
> > > after format, everything is gone, well, it is a format. I did not
> really
> > > see
> > > anything in log. Not sure what caused it.
> > >
> > >
> > > William
> > >
> > >
> > > On Mon, Mar 8, 2010 at 12:39 AM, Bradford Stephens <
> > > bradfordstephens@gmail.com> wrote:
> > >
> > > > Yeah. Don't put things in /tmp. That's unpleasant in the long run.
> > > >
> > > > On Sun, Mar 7, 2010 at 9:36 PM, Eason.Lee <leongfans@gmail.com>
> wrote:
> > > > > Your /tmp directory is cleaned automaticly?
> > > > >
> > > > > Try to set dfs.name.dir/dfs.data.dir to a safe dir~~
> > > > >
> > > > > 2010/3/8 William Kang <weliam.cloud@gmail.com>
> > > > >
> > > > >> Hi all,
> > > > >> I am running HDFS in Pseudo-distributed mode. Every time after
I
> > > > restarted
> > > > >> the machine, I have to format the namenode otherwise the
> > > localhost:50070
> > > > >> wont show up. It is quite annoying to do so since all the data
> would
> > > be
> > > > >> lost. Does anybody know this happens? And how should I fix this
> > > problem?
> > > > >> Many thanks.
> > > > >>
> > > > >>
> > > > >> William
> > > > >>
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > http://www.drawntoscalehq.com --  The intuitive, cloud-scale data
> > > > solution. Process, store, query, search, and serve all your data.
> > > >
> > > > http://www.roadtofailure.com -- The Fringes of Scalability, Social
> > > > Media, and Computer Science
> > > >
> > >
> >
>

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