Error: undefined method "each" for a line when running flex-mapreduce with a distributed cache file

Question

I have the following error:

Error: undefined method `each' for "s3n://dico-count-words/Cache/dicoClazz.p#dicoClazzCache.p":String

When I run the following command line to run the mapreduce algorithm on an Amazon EMR cluster via flex-mapreduce, specifying a distributed cache file:

    ./elastic-mapreduce --create --stream \
> --input s3n://dico-count-words/Words \
> --output s3n://dico-count-words/Output \
> --mapper s3n://dico-count-words/Code/mapper.py \
> --reducer s3n://dico-count-words/Code/reducer.py \
> --log-uri s3n://dico-count-words/Logs \
> --cache s3n://dico-count-words/Cache/dicoClazz.p#dicoClazz.p

I followed the instructions that I found here . I had no problems with similar commands to create other clusters that do not need a distributed cache file. I also managed to get this running using the AWS console. But I would rather do it through the CLI. I think this may be a problem with a ruby ​​similar to this one . But I don’t know anything about ruby, so this is just a hunch. This is also the first time I'm using AWS and so is elastic-mapreduce. For your information, this is the ruby ​​version for me:

ruby 2.0.0p451 (2014-02-24 revision 45167) [universal.x86_64-darwin13]

Do you have any ideas on where this error came from? Any suggestions for fixing it?

Many thanks.

Answer 1

each ruby ​​ String.

:

---

x = "test"
x.each {|character| puts character}
>>>NoMethodError: undefined method `each' for "test":String

---

, , . irb :

2.0.0-p247 :001 > x = "test"
2.0.0-p247 :002 > x.each <now hit tab twice>


2.0.0-p247 :003 > x.each_
x.each_byte       x.each_char       x.each_codepoint  x.each_line

- . ruby ​​2.0.0-p247. .

irb . , irb , each. , each . . "test" ["t", "e", "s", "t"]. , , x.each_char - . :

x.each_char {|c| puts c}

, .

, , . , .each String.

, .