cannot import namespace reducers

[Johannes]

Hi,

trying

(require '[clojure.core.reducers :as r])

at the repl prompt the error message

CompilerException java.lang.ClassNotFoundException: jsr166y.ForkJoinPool, compiling:(clojure/core/reducers.clj:56:21) 

What is going wrong?

Johannes

[Mayank Jain]

Try

(:require '[clojure.core.reducers :as r])

i.e. :require

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Regards,
Mayank.

[László Török]

Hi,

there are two ways to deal with this:

a) use Java 7

2013/6/16 Johannes <bra...@nordakademie.de>

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László Török

[László Török]

.. sorry, gmail's new annoying keyboard shortcut

b) include the dependency to the forkjoin library [1] that is not included in Java6 

Las

[1] http://mavenhub.com/mvn/central/org.coconut.forkjoin/jsr166y/070108

2013/6/16 László Török <ltor...@gmail.com>

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László Török

[László Török]

(require '[clojure.core.reducers :as r]) is correct.

(:require '[clojure.core.reducers :as r]) only works within the ns macro:

(ns 'yournamespace

  (:require '[clojure.core.reducers :as r]))

Las

2013/6/16 Mayank Jain <fires...@gmail.com>

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László Török

[Johannes Brauer]

thank you, Las, for the quick tip. I will give Java 7 a try. I hope there are no problems on Mac OS 10.8.4

Johannes

Am 16.06.2013 um 22:15 schrieb László Török <ltor...@gmail.com>

:

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Sitz:
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[László Török]

I'm on Java7 and OS X 10.8.4, no problem over here. :)

2013/6/16 Johannes Brauer <bra...@nordakademie.de>

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László Török

[Johannes Brauer]

now, I've Java 7 installed and get another error message:

Exception namespace 'clojure.core.reducers' not found  clojure.core/load-lib (core.clj:5380)

any further hints?

Johannes

Am 16.06.2013 um 22:43 schrieb Johannes Brauer <bra...@nordakademie.de>

:

[László Török]

are you on clojure 1.5+ ?

If I launch the REPL using "lein repl"

and then

(require 'clojure.core.reducers)

it works ok for me.

2013/6/16 Johannes Brauer <bra...@nordakademie.de>

--

László Török

[Johannes Brauer]

I am on clojure 1.5.1 and I use lein repl.

But after 

(require '[clojure.core.reducers :as r])

I still get the same error message as with Java 6:

CompilerException java.lang.ClassNotFoundException: jsr166y.ForkJoinPool, compiling:(clojure/core/reducers.clj:56:21)

A second input of

(require '[clojure.core.reducers :as r])

generates the message:

Exception namespace 'clojure.core.reducers' not found  clojure.core/load-lib (core.clj:5380)

Johannes

Am 16.06.2013 um 23:16 schrieb László Török <ltor...@gmail.com>

:

[László Török]

Then you are having a path problem.
Your lein is still using java6
Check your $PATH and $JAVA_HOME env. variables.

As this not strictly clojure related, let's not spam the list, im happy to help off list

Sent from my phone

[Keith Maynard]

Please spam the list!!! I am sure anyone who receives that message is probably running Mac OS X 10.7.x or later and trying to unravel the mess between Java 6 and Java 7.  Please post recommendations. I finally got Eclipse to see the jdl1.7.0_25.jdk now how do I get the OS to replace the Apple installed 1.6.x?

[Johannes Brauer]

if I remember correctly I solved the problem by reinstalling Java 7 from Oracle. Thereafter my $JAVA_HOME points to:

/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home

Johannes

Am 24.07.2013 um 03:02 schrieb Keith Maynard <kpma...@gmail.com>

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