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From Patrick Wendell <>
Subject Re: SCALA_HOME or SCALA_LIBRARY_PATH not set during build
Date Sun, 01 Jun 2014 18:21:15 GMT
I went ahead and created a JIRA for this and back ported the
improvement into branch-1.0. This wasn't a regression per-se because
the behavior existed in all previous versions, but it's annoying
behavior so best to fix it.

- Patrick

On Sun, Jun 1, 2014 at 11:13 AM, Patrick Wendell <> wrote:
> This is a false error message actually - the Maven build no longer
> requires SCALA_HOME but the message/check was still there. This was
> fixed recently in master:
> I can back port that fix into branch-1.0 so it will be in 1.0.1 as
> well. For other people running into this, you can export SCALA_HOME to
> any value and it will work.
> - Patrick
> On Sat, May 31, 2014 at 8:34 PM, Colin McCabe <> wrote:
>> Spark currently supports two build systems, sbt and maven.  sbt will
>> download the correct version of scala, but with Maven you need to supply it
>> yourself and set SCALA_HOME.
>> It sounds like the instructions need to be updated-- perhaps create a JIRA?
>> best,
>> Colin
>> On Sat, May 31, 2014 at 7:06 PM, Soren Macbeth <> wrote:
>>> Hello,
>>> Following the instructions for building spark 1.0.0, I encountered the
>>> following error:
>>> [ERROR] Failed to execute goal
>>> org.apache.maven.plugins:maven-antrun-plugin:1.7:run (default) on project
>>> spark-core_2.10: An Ant BuildException has occured: Please set the
>>> SCALA_HOME (or SCALA_LIBRARY_PATH if scala is on the path) environment
>>> variables and retry.
>>> [ERROR] around Ant part ...<fail message="Please set the SCALA_HOME (or
>>> SCALA_LIBRARY_PATH if scala is on the path) environment variables and
>>> retry.">... @ 6:126 in
>>> /Users/soren/src/spark-1.0.0/core/target/antrun/build-main.xml
>>> No where in the documentation does it mention that having scala installed
>>> and either of these env vars set nor what version should be installed.
>>> Setting these env vars wasn't required for 0.9.1 with sbt.
>>> I was able to get past it by downloading the scala 2.10.4 binary package to
>>> a temp dir and setting SCALA_HOME to that dir.
>>> Ideally, it would be nice to not have to require people to have a
>>> standalone scala installation but at a minimum this requirement should be
>>> documented in the build instructions no?
>>> -Soren

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