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https://issues.apache.org/jira/browse/PIO-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16117762#comment-16117762
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Takako Shimamoto commented on PIO-112:
--------------------------------------
[~sequential-systems] Scala 2.12 has not been supported as of PredictionIO
0.11.0-incubating yet. Furthermore, your template is compiled with Scala 2.10.
PredictionIO and any Official Templates will build against Scala 2.10 by
default. If you want to use Scala 2.11, you’ll need to build PredictionIO
against Scala 2.11, and specify the version of Scala in build.sbt under
MyRecommendation as follows:
{code}
scalaVersion := "2.11.8"
{code}
Now you build MyRecommendation and deploy it.
If you have any question, please post to the User Mailing List
([email protected]).
> pio train command not working
> ------------------------------
>
> Key: PIO-112
> URL: https://issues.apache.org/jira/browse/PIO-112
> Project: PredictionIO
> Issue Type: Bug
> Reporter: Al Costa
>
> When I type *pio train* on the MyRecommendation initial test on a Centos
> 6-9.el6.12.3.x86_64, java build 1.8.0_131-b11, scala 2.12.2 I get
> SLF4J: Class path contains multiple SLF4J bindings.
> SLF4J: Found binding in
> [jar:file:/home/al/predictionio/lib/spark/pio-data-hdfs-assembly-0.11.0-incubating.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Found binding in
> [jar:file:/home/al/predictionio/lib/pio-assembly-0.11.0-incubating.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an
> explanation.
> SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
> [INFO] [Runner$] Submission command: /home/al/spark/bin/spark-submit --class
> org.apache.predictionio.workflow.CreateWorkflow --jars
> file:/usr/java/jdk1.8.0_131/jre/lib/postgresql-42.1.4.jar,file:/usr/java/jdk1.8.0_131/jre/lib/mysql-connector-java-5.1.43-bin.jar,file:/home/al/predictionio/MyRecommendation/target/scala-2.10/template-scala-parallel-recommendation_2.10-0.1-SNAPSHOT.jar,file:/home/al/predictionio/MyRecommendation/target/scala-2.10/template-scala-parallel-recommendation-assembly-0.1-SNAPSHOT-deps.jar,file:/home/al/predictionio/lib/spark/pio-data-hdfs-assembly-0.11.0-incubating.jar,file:/home/al/predictionio/lib/spark/pio-data-localfs-assembly-0.11.0-incubating.jar,file:/home/al/predictionio/lib/spark/pio-data-elasticsearch1-assembly-0.11.0-incubating.jar,file:/home/al/predictionio/lib/spark/pio-data-jdbc-assembly-0.11.0-incubating.jar,file:/home/al/predictionio/lib/spark/pio-data-hbase-assembly-0.11.0-incubating.jar
> --files
> file:/home/al/predictionio/conf/log4j.properties,file:/home/al/hadoop/etc/hadoop/core-site.xml
> --driver-class-path
> /home/al/predictionio/conf:/usr/java/jdk1.8.0_131/jre/lib/postgresql-42.1.4.jar:/usr/java/jdk1.8.0_131/jre/lib/mysql-connector-java-5.1.43-bin.jar:/home/al/hadoop/etc/hadoop
> --driver-java-options -Dpio.log.dir=/home/al
> file:/home/al/predictionio/lib/pio-assembly-0.11.0-incubating.jar --engine-id
> org.example.recommendation.RecommendationEngine --engine-version
> 202579ebeda20d955216756ce7fd3751be7a1c5a --engine-variant
> file:/home/al/predictionio/MyRecommendation/engine.json --verbosity 0
> --json-extractor Both --env
> PIO_ENV_LOADED=1,PIO_STORAGE_SOURCES_MYSQL_PASSWORD=pio,PIO_STORAGE_REPOSITORIES_METADATA_NAME=pio_meta,PIO_FS_BASEDIR=/home/al/.pio_store,PIO_STORAGE_SOURCES_MYSQL_URL=jdbc:mysql://localhost/pio,PIO_HOME=/home/al/predictionio,PIO_FS_ENGINESDIR=/home/al/.pio_store/engines,PIO_STORAGE_SOURCES_PGSQL_URL=jdbc:postgresql://localhost/pio,PIO_STORAGE_SOURCES_MYSQL_TYPE=jdbc,PIO_STORAGE_REPOSITORIES_METADATA_SOURCE=PGSQL,PIO_STORAGE_REPOSITORIES_MODELDATA_SOURCE=PGSQL,PIO_STORAGE_REPOSITORIES_EVENTDATA_NAME=pio_event,PIO_STORAGE_SOURCES_MYSQL_USERNAME=pio,PIO_STORAGE_SOURCES_PGSQL_PASSWORD=pio,PIO_STORAGE_SOURCES_PGSQL_TYPE=jdbc,PIO_FS_TMPDIR=/home/al/.pio_store/tmp,PIO_STORAGE_SOURCES_PGSQL_USERNAME=pio,PIO_STORAGE_REPOSITORIES_MODELDATA_NAME=pio_model,PIO_STORAGE_REPOSITORIES_EVENTDATA_SOURCE=PGSQL,PIO_CONF_DIR=/home/al/predictionio/conf
> Exception in thread "main" java.lang.NoSuchMethodError:
> scala.reflect.api.JavaUniverse.runtimeMirror(Ljava/lang/ClassLoader;)Lscala/reflect/api/JavaMirrors$JavaMirror;
> at
> org.apache.predictionio.workflow.WorkflowUtils$.getEngine(WorkflowUtils.scala:54)
> at
> org.apache.predictionio.workflow.CreateWorkflow$.liftedTree1$1(CreateWorkflow.scala:196)
> at
> org.apache.predictionio.workflow.CreateWorkflow$.main(CreateWorkflow.scala:195)
> at
> org.apache.predictionio.workflow.CreateWorkflow.main(CreateWorkflow.scala)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:743)
> at
> org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:187)
> at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:212)
> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:126)
> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
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