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https://issues.apache.org/jira/browse/MAHOUT-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17068851#comment-17068851
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Tariq Jawed commented on MAHOUT-2099:
-------------------------------------
[~Andrew_Palumbo] I am only able to run the application, if I set
allowMultipleContexts to true; and create new SparkContext like this, this sets
the serializer in similar way, which mahout itself sets under
mahoutSparkContext() method, but the problem is that I have to allow multiple
context, is there any other good way; to set the serializers on the existing
sparkContext, which I have been given; or I have to create a new SparkContext.
{code:java}
val sparkConf = sc.getConf
sparkConf.setAppName("MagentoRecommendationEngine").set("spark.serializer",
"org.apache.spark.serializer.KryoSerializer").set("spark.kryo.registrator",
"org.apache.mahout.sparkbindings.io.MahoutKryoRegistrator").set("spark.driver.allowMultipleContexts",
"true")
implicit val msc: SparkDistributedContext = sc2sdc(new SparkContext(sparkConf))
{code}
> Using Mahout as a Library in Spark Cluster
> ------------------------------------------
>
> Key: MAHOUT-2099
> URL: https://issues.apache.org/jira/browse/MAHOUT-2099
> Project: Mahout
> Issue Type: Question
> Components: cooccurrence, Math
> Environment: Spark version 2.3.0.2.6.5.10-2
>
> [EDIT] AP
> Reporter: Tariq Jawed
> Priority: Major
>
> I have a Spark Cluster already setup, and this is the environment not in my
> direct control, but they do allow FAT JARs to be installed with the
> dependencies. I tried to package my Spark Application with some mahout code
> for SimilarityAnalysis, added Mahout library in POM file, and they are
> successfully packaged.
> The problem however is that I am getting this error while using existing
> Spark Context to build Distributed Spark Context for
> Mahout
> [EDIT]AP:
> {code:xml}
> pom.xml
> {...}
> dependency>
> <groupId>org.apache.mahout</groupId>
> <artifactId>mahout-math</artifactId>
> <version>0.13.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.mahout</groupId>
> <artifactId>mahout-math-scala_2.10</artifactId>
> <version>0.13.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.mahout</groupId>
> <artifactId>mahout-spark_2.10</artifactId>
> <version>0.13.0</version>
> </dependency>
> <dependency>
> <groupId>com.esotericsoftware</groupId>
> <artifactId>kryo</artifactId>
> <version>5.0.0-RC5</version>
> </dependency>
> {code}
>
> Code:
> {code}
> implicit val sc: SparkContext = sparkSession.sparkContext
> implicit val msc: SparkDistributedContext = sc2sdc(sc)
> Error:
> ERROR TaskSetManager: Task 7.0 in stage 10.0 (TID 58) had a not serializable
> result: org.apache.mahout.math.DenseVector
>
> And if I try to build the context using mahoutSparkContext() then its giving
> me the error that MAHOUT_HOME not found.
> Code:
> implicit val msc = mahoutSparkContext(masterUrl = "local", appName =
> "CooccurrenceDriver")
> Error:
> MAHOUT_HOME is required to spawn mahout-based spark jobs
> {code}
> My question is that how do I proceed in this situation? should I have to ask
> the administrators of the Spark environment to install Mahout library, or is
> there anyway I can proceed packaging my application as fat JAR.
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