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From Briggs <acidbri...@gmail.com>
Subject Re: It seems the hadoop start scripts broken under cygwin and Fedora Core
Date Wed, 18 Jul 2007 18:15:29 GMT
Well, if cd were aliased a 'which cd' would have immediately told you. :-)



On 7/18/07, charlie w <spambait132@gmail.com> wrote:
> Whoa yeah, nice catch indeed; I would never have thought of that.
>
> It turns out that's not the issue at all, but that suggestion pointed me in
> the right direction.
>
> A few things to note here...
> Thing 1: 'which cd' doesn't help because cd is a builtin, and so you get the
> "which: no cd in (..." result.
> Thing 2: Because I typically don't use '-x' in my alias commands, the hadoop
> script doesn't inherit my shell aliases.  I verified this by adding an
> 'alias -p' to the hadoop script, and the script has no aliases for anything.
>
> Thing 3: If the CDPATH environment variable exists, and the path is
> ambiguous, the cd command is *not* silent, aliased or not.  It will print
> the dir it chose to cd to.  In my case, there were 2 'bin' possibilities in
> my CDPATH.
>
> So I'm going to unset my CDPATH, since I never really make use of it for
> anything.  I forgot it was set, and probably would have been pretty
> surprised when it would actually have had an effect.
>
> I know this kind of thing is incredibly difficult to accomodate, but
> perhaps having the hadoop scripts deal with the potential output from cd
> might be worthwhile.
>
> Thanks for the tips,
> C
>
>
>
> On 7/18/07, Briggs <acidbriggs@gmail.com> wrote:
> >
> > Good call Ted.  I guess a 'which cd' might help to find out.
> >
> >
> > On 7/18/07, Ted Dunning < tdunning@veoh.com> wrote:
> > >
> > > It sounds to me like you have somehow aliased cd.  This may be due to a
> > > sysadmin being too clever or due to your own profile.  Needless to say,
> > this
> > > is really bad practice.
> > >
> > > Here is what I see on Redhat:
> > >
> > > -bash-3.00$ cd /tmp
> > > -bash-3.00$
> > >
> > > (no output from cd)
> > >
> > >
> > > On 7/18/07 9:15 AM, "charlie w" < spambait132@gmail.com > wrote:
> > >
> > > > Specifically this:
> > > >
> > > > bin=`dirname "$0"`
> > > > bin=`cd "$bin"; pwd`
> > > >
> > > > . "$bin"/hadoop-config.sh
> > > >
> > > > The problem is that the 'cd' command on cygwin and Fedora is not
> > silent, so
> > > > if one tries:
> > > >
> > > > bin/hadoop namenode format
> > > >
> > > > one winds up with this output:
> > > >
> > > > bin/hadoop: line 22: /home/charlie/hadoop-0.13.0/bin
> > > > /home/charlie/bin/hadoop-config.sh: No such file or directory
> > > >
> > > > It appears that simply adding >/dev/null to the cd command fixes
> > things:
> > > >
> > > >  bin=`cd "$bin" > /dev/null; pwd`
> > >
> > >
> >
> >
> > --
> > "Conscious decisions by conscious minds are what make reality real"
> >
>


-- 
"Conscious decisions by conscious minds are what make reality real"

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