0.21.0 - Java Class Error

[Witold Januszewski <wi...@skni.org>]

To Whom It May Concern,

When trying to run Hadoop 0.21 with JDK 1.6_23 I get an error:
java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName.
The full error log is in the attached .png
Can you help me? I'd be grateful.


Yours faithfully,
Witold Januszewski

Re: 0.21.0 - Java Class Error

[Witold Januszewski <wi...@skni.org>]

Hi Tom,

Thanks for your anwser. Yet after adding the suggested line I get another
bug (enclosed in .png).

Yes, it's Windows 7. I'm considering switching to Linux now :-) There's also
a virtual machine with Hadoop provided by Yahoo!, but I don't know if I can
install Mahout there. That's my goal actually - doing a collaborative
filtering project with Mahout for my classes. The trouble is, I chose the
technology and the project leader couldn't help me with it. Also the project
topics were assigned individually. So if you offer me some more help I'd be
grateful.

Best Wishes,
Witold


2011/4/8 Tom White <to...@cloudera.com>

> Hi Witold,
>
> Is this on Windows? The scripts were re-structured after Hadoop 0.20,
> and looking at them now I notice that the cygwin path translation for
> the classpath seems to be missing. You could try adding the following
> line to the "if $cygwin" clause in bin/hadoop-config.sh:
>
>  CLASSPATH=`cygpath -p -w "$CLASSPATH"`
>
> It's worth filing a bug for this too.
>
> Cheers,
> Tom
>
> On Thu, Apr 7, 2011 at 1:24 PM, Witold Januszewski <wi...@skni.org>
> wrote:
> > To Whom It May Concern,
> >
> > When trying to run Hadoop 0.21 with JDK 1.6_23 I get an error:
> > java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName.
> > The full error log is in the attached .png
> > Can you help me? I'd be grateful.
> >
> >
> > Yours faithfully,
> > Witold Januszewski
> >
> >
> >
>

Re: 0.21.0 - Java Class Error

[Tom White <to...@cloudera.com>]

Hi Witold,

Is this on Windows? The scripts were re-structured after Hadoop 0.20,
and looking at them now I notice that the cygwin path translation for
the classpath seems to be missing. You could try adding the following
line to the "if $cygwin" clause in bin/hadoop-config.sh:

  CLASSPATH=`cygpath -p -w "$CLASSPATH"`

It's worth filing a bug for this too.

Cheers,
Tom

On Thu, Apr 7, 2011 at 1:24 PM, Witold Januszewski <wi...@skni.org> wrote:
> To Whom It May Concern,
>
> When trying to run Hadoop 0.21 with JDK 1.6_23 I get an error:
> java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName.
> The full error log is in the attached .png
> Can you help me? I'd be grateful.
>
>
> Yours faithfully,
> Witold Januszewski
>
>
>