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Posted to user@mahout.apache.org by Masoud Nikravesh <ni...@gmail.com> on 2014/03/21 01:30:00 UTC
Mahout Error ==> Chapter 2- First problem - Recoomender- Java.lang.Error
Exception in thread "main" java.lang.Error: Unresolved compilation
problems:
DataModel cannot be resolved to a type
FileDataModel cannot be resolved to a type
UserSimilarity cannot be resolved to a type
PearsonCorrelationSimilarity cannot be resolved to a type
UserNeighborhood cannot be resolved to a type
NearestNUserNeighborhood cannot be resolved to a type
Recommender cannot be resolved to a type
GenericUserBasedRecommender cannot be resolved to a type
RecommendedItem cannot be resolved to a type
RecommendedItem cannot be resolved to a type
at mia.recommender.ch02.RecommenderIntro.main(RecommenderIntro.java:21)
================
Looks like your dev environment is not set up correctly.
Pop over to the Mahout mailing list and bring details about what Mahout
version you are using, what commands you are using and what kind of
environment you are using.
Check out
https://mahout.apache.org/general/mailing-lists,-irc-and-archives.html for
more info.
=================
More Info:
thanks for the pointer.
MahOut: 0.9
Apache Maven 3.2.1
Eclipse: Kepler Release 2
Java: Latest 7
I went through all the possible recommendations for this book
and also for MahOut
The codes that are written for MahOut 0.5
looks like is not consistent to the latest version of MahOut and Maven, ect.
I have even tried different versions or MahOut, no luck.
The error looks like related to the DataModel or/and Reading the CVS data
file.
Looks like the program is not compiling correctly.
I have set the environment like everyone else said, and I tried step by
step, and
looks like everything goes through and succeed.
So, no error till the last point. When I try to run the program, then I get
the error.
Thanks
========================
Re: Mahout Error ==> Chapter 2- First problem - Recoomender- Java.lang.Error
Posted by Masoud Nikravesh <ni...@gmail.com>.
Looks like, it doesn't matter, how I tried to make my package into Java, it
is not working.
Anyone can tell me a good reference to build the package
from scratch (I tried a few, and didn't work).
I am using window system.
I used the approach is given at:
https://cwiki.apache.org/confluence/display/MAHOUT/BuildingMahout
and also this blog
http://shuyo.wordpress.com/2011/02/01/mahout-development-environment-with-maven-and-eclipse-1/
I apparently, succeed to build the project, and all steps went through
(SUCCED)
and no error were generated.
As I mentioned, I am using Mahout 0.9,
I was not able to do the same using Mahout 0.5,0.6, 0.7 or other versions.
At this point, I just need to experiment in local window machine,
rather than running at amazon System or Hadoop machine.
Thanks
On Thu, Mar 20, 2014 at 8:27 PM, Ted Dunning <te...@gmail.com> wrote:
> This looks like your class path is not set up correctly.
>
> You can try running with -verbose:class as a command line option and see if
> the Mahout classes are even being loaded.
>
>
>
> On Thu, Mar 20, 2014 at 5:30 PM, Masoud Nikravesh <nikraveshucb@gmail.com
> >wrote:
>
> > Exception in thread "main" java.lang.Error: Unresolved compilation
> > problems:
> > DataModel cannot be resolved to a type
> > FileDataModel cannot be resolved to a type
> > UserSimilarity cannot be resolved to a type
> > PearsonCorrelationSimilarity cannot be resolved to a type
> > UserNeighborhood cannot be resolved to a type
> > NearestNUserNeighborhood cannot be resolved to a type
> > Recommender cannot be resolved to a type
> > GenericUserBasedRecommender cannot be resolved to a type
> > RecommendedItem cannot be resolved to a type
> > RecommendedItem cannot be resolved to a type
> >
> > at mia.recommender.ch02.RecommenderIntro.main(RecommenderIntro.java:21)
> > ================
> >
> > Looks like your dev environment is not set up correctly.
> >
> > Pop over to the Mahout mailing list and bring details about what Mahout
> > version you are using, what commands you are using and what kind of
> > environment you are using.
> >
> > Check out
> > https://mahout.apache.org/general/mailing-lists,-irc-and-archives.htmlfor
> > more info.
> >
> >
> > =================
> > More Info:
> > thanks for the pointer.
> >
> > MahOut: 0.9
> > Apache Maven 3.2.1
> > Eclipse: Kepler Release 2
> > Java: Latest 7
> >
> > I went through all the possible recommendations for this book
> > and also for MahOut
> >
> > The codes that are written for MahOut 0.5
> > looks like is not consistent to the latest version of MahOut and Maven,
> > ect.
> > I have even tried different versions or MahOut, no luck.
> > The error looks like related to the DataModel or/and Reading the CVS data
> > file.
> > Looks like the program is not compiling correctly.
> > I have set the environment like everyone else said, and I tried step by
> > step, and
> > looks like everything goes through and succeed.
> > So, no error till the last point. When I try to run the program, then I
> get
> > the error.
> >
> > Thanks
> > ========================
> >
>
Re: Mahout Error ==> Chapter 2- First problem - Recoomender- Java.lang.Error
Posted by Ted Dunning <te...@gmail.com>.
This looks like your class path is not set up correctly.
You can try running with -verbose:class as a command line option and see if
the Mahout classes are even being loaded.
On Thu, Mar 20, 2014 at 5:30 PM, Masoud Nikravesh <ni...@gmail.com>wrote:
> Exception in thread "main" java.lang.Error: Unresolved compilation
> problems:
> DataModel cannot be resolved to a type
> FileDataModel cannot be resolved to a type
> UserSimilarity cannot be resolved to a type
> PearsonCorrelationSimilarity cannot be resolved to a type
> UserNeighborhood cannot be resolved to a type
> NearestNUserNeighborhood cannot be resolved to a type
> Recommender cannot be resolved to a type
> GenericUserBasedRecommender cannot be resolved to a type
> RecommendedItem cannot be resolved to a type
> RecommendedItem cannot be resolved to a type
>
> at mia.recommender.ch02.RecommenderIntro.main(RecommenderIntro.java:21)
> ================
>
> Looks like your dev environment is not set up correctly.
>
> Pop over to the Mahout mailing list and bring details about what Mahout
> version you are using, what commands you are using and what kind of
> environment you are using.
>
> Check out
> https://mahout.apache.org/general/mailing-lists,-irc-and-archives.html for
> more info.
>
>
> =================
> More Info:
> thanks for the pointer.
>
> MahOut: 0.9
> Apache Maven 3.2.1
> Eclipse: Kepler Release 2
> Java: Latest 7
>
> I went through all the possible recommendations for this book
> and also for MahOut
>
> The codes that are written for MahOut 0.5
> looks like is not consistent to the latest version of MahOut and Maven,
> ect.
> I have even tried different versions or MahOut, no luck.
> The error looks like related to the DataModel or/and Reading the CVS data
> file.
> Looks like the program is not compiling correctly.
> I have set the environment like everyone else said, and I tried step by
> step, and
> looks like everything goes through and succeed.
> So, no error till the last point. When I try to run the program, then I get
> the error.
>
> Thanks
> ========================
>