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From Mich Talebzadeh <mich.talebza...@gmail.com>
Subject Re: Building standalone spark application via sbt
Date Wed, 20 Jul 2016 14:39:15 GMT
you need an uber jar file.

Have you actually followed the dependencies and project sub-directory build?

check this.

http://stackoverflow.com/questions/28459333/how-to-build-an-uber-jar-fat-jar-using-sbt-within-intellij-idea

under three answers the top one.

I started reading the official SBT tutorial
<http://www.scala-sbt.org/0.13/tutorial/>.  .....

HTH

Dr Mich Talebzadeh



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On 20 July 2016 at 09:54, Sachin Mittal <sjmittal@gmail.com> wrote:

> Hi,
> I am following the example under
> https://spark.apache.org/docs/latest/quick-start.html
> For standalone scala application.
>
> I added all my dependencies via build.sbt (one dependency is under lib
> folder).
>
> When I run sbt package I see the jar created under
> target/scala-2.10/
>
> So compile seems to be working fine. However when I inspect that jar, it
> only contains my scala class.
> Unlike in java application we build a standalone jar, which contains all
> the dependencies inside that jar, here all the dependencies are missing.
>
> So as expected when I run the application via spark-submit I get the
> NoClassDefFoundError.
>
> Here is my build.sbt
>
> name := "Test Advice Project"
> version := "1.0"
> scalaVersion := "2.10.6"
> libraryDependencies ++= Seq(
>     "org.apache.spark" %% "spark-core" % "1.6.1",
>     "org.apache.spark" %% "spark-sql" % "1.6.1"
> )
>
> Can anyone please guide me to as what is going wrong and why sbt package
> is not including all the dependencies jar classes in the new jar.
>
> Thanks
> Sachin
>
>
> On Tue, Jul 19, 2016 at 8:23 PM, Andrew Ehrlich <andrew@aehrlich.com>
> wrote:
>
>> Yes, spark-core will depend on Hadoop and several other jars.  Here’s the
>> list of dependencies:
>> https://github.com/apache/spark/blob/master/core/pom.xml#L35
>>
>> Whether you need spark-sql depends on whether you will use the DataFrame
>> API. Without spark-sql, you will just have the RDD API.
>>
>> On Jul 19, 2016, at 7:09 AM, Sachin Mittal <sjmittal@gmail.com> wrote:
>>
>>
>> Hi,
>> Can someone please guide me what all jars I need to place in my lib
>> folder of the project to build a standalone scala application via sbt.
>>
>> Note I need to provide static dependencies and I cannot download the jars
>> using libraryDependencies.
>> So I need to provide all the jars upfront.
>>
>> So far I found that we need:
>> spark-core_<version>.jar
>>
>> Do we also need
>> spark-sql_<version>.jar
>> and
>> hadoop-core-<version>.jar
>>
>> Is there any jar from spark side I may be missing? What I found that
>> spark-core needs hadoop-core classes and if I don't add them then sbt was
>> giving me this error:
>> [error] bad symbolic reference. A signature in SparkContext.class refers
>> to term hadoop
>> [error] in package org.apache which is not available.
>>
>> So I was just confused on library dependency part when building an
>> application via sbt. Any inputs here would be helpful.
>>
>> Thanks
>> Sachin
>>
>>
>>
>>
>>
>

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