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Stefan Goldener edited comment on MAHOUT-2093 at 3/25/20, 1:04 PM: ------------------------------------------------------------------- In addition line 240-257 (in the current master ./bin/mahout) can potentially be removed by just adding: {code:bash} export CLASSPATH=$CLASSPATH:$(find $SPARK_HOME/jars -name '*.jar' -printf '%p:' | sed 's/:$//') {code} where the duplicate jars throw an error but it's still working fine (at least for <=0.13.0 versions). One could also just exclude those 3 jars that causing the duplication error e.g.: {code:bash} export CLASSPATH=$CLASSPATH:$(find $SPARK_HOME/jars -name '*.jar' -not -name 'netty-3.8.0.Final.jar' -printf '%p:' | sed 's/:$//') {code} this removes a lot of complexity that's not really necessary was (Author: renedlog): In addition line 240-257 (in the current master ./bin/mahout) can potentially be removed by just adding: {code:bash} export CLASSPATH=$CLASSPATH:$(find $SPARK_HOME/jars -name '*.jar' -printf '%p:' | sed 's/:$//') {code} where the duplicate jars throw an error but it's still working fine. One could also just exclude those 3 jars that causing the duplication error e.g.: {code:bash} export CLASSPATH=$CLASSPATH:$(find $SPARK_HOME/jars -name '*.jar' -not -name 'netty-3.8.0.Final.jar' -printf '%p:' | sed 's/:$//') {code} this removes a lot of complexity that's not really necessary > Mahout Source Broken > -------------------- > > Key: MAHOUT-2093 > URL: https://issues.apache.org/jira/browse/MAHOUT-2093 > Project: Mahout > Issue Type: Bug > Components: Algorithms, Collaborative Filtering, Documentation > Affects Versions: 0.14.0, 0.13.2, 14.1 > Reporter: Stefan Goldener > Priority: Blocker > Fix For: 14.1 > > Attachments: image-2020-03-12-07-10-34-731.png > > > Seems like newer versions of Mahout do have problems with spark bindings e.g. > mahout spark-itemsimilarity or mahout spark-rowsimilarity do not work due to > class not found exceptions. > {code:java} > Error: Could not find or load main class > org.apache.mahout.drivers.RowSimilarityDriver > {code} > {code:java} > Error: Could not find or load main class > org.apache.mahout.drivers.ItemSimilarityDriver > {code} > whereas *mahout spark-shell* works flawlessly. > Here is a short Dockerfile to show the issue: > {code:yaml} > FROM openjdk:8-alpine > ENV spark_uid=185 > ENV SCALA_MAJOR=2.11 > ENV SCALA_MAJOR_MINOR=2.11.12 > ENV HADOOP_MAJOR=2.7 > ENV SPARK_MAJOR_MINOR=2.4.5 > ENV MAHOUT_MAJOR_MINOR=0.14.0 > ENV MAHOUT_VERSION=mahout-${MAHOUT_MAJOR_MINOR} > ENV MAHOUT_BASE=/opt/mahout > ENV MAHOUT_HOME=${MAHOUT_BASE}/${MAHOUT_VERSION} > ENV SPARK_VERSION=spark-${SPARK_MAJOR_MINOR} > ENV SPARK_BASE=/opt/spark > ENV SPARK_HOME=${SPARK_BASE}/${SPARK_VERSION} > ENV MAVEN_OPTS="-Xmx2g -XX:ReservedCodeCacheSize=1g" > ENV > SPARK_SRC_URL="https://archive.apache.org/dist/spark/${SPARK_VERSION}/${SPARK_VERSION}.tgz" > ENV > MAHOUT_SRC_URL="https://archive.apache.org/dist/mahout/${MAHOUT_MAJOR_MINOR}/mahout-${MAHOUT_MAJOR_MINOR}-source-release.zip" > ENV ZINC_PORT=3030 > ### build spark > RUN set -ex && \ > apk upgrade --no-cache && \ > ln -s /lib /lib64 && \ > apk add --no-cache bash python py-pip tini libc6-compat linux-pam krb5 > krb5-libs nss curl openssl git maven && \ > pip install setuptools && \ > mkdir -p ${MAHOUT_HOME} && \ > mkdir -p ${SPARK_BASE} && \ > curl -LfsS ${SPARK_SRC_URL} -o ${SPARK_HOME}.tgz && \ > tar -xzvf ${SPARK_HOME}.tgz -C ${SPARK_BASE}/ && \ > rm ${SPARK_HOME}.tgz && \ > export > PATH=$PATH:$MAHOUT_HOME/bin:$MAHOUT_HOME/lib:$SPARK_HOME/bin:$JAVA_HOME/bin > && \ > bash ${SPARK_HOME}/dev/change-scala-version.sh ${SCALA_MAJOR} && \ > bash ${SPARK_HOME}/dev/make-distribution.sh --name ${DATE}-${REVISION} > --pip --tgz -DzincPort=${ZINC_PORT} \ > -Phadoop-${HADOOP_MAJOR} -Pkubernetes -Pkinesis-asl -Phive > -Phive-thriftserver -Pscala-${SCALA_MAJOR} > > ### build mahout > RUN curl -LfsS $MAHOUT_SRC_URL -o ${MAHOUT_BASE}.zip && \ > unzip ${MAHOUT_BASE}.zip -d ${MAHOUT_BASE} && \ > rm ${MAHOUT_BASE}.zip && \ > cd ${MAHOUT_HOME} && \ > mvn -Dspark.version=${SPARK_MAJOR_MINOR} > -Dscala.version=${SCALA_MAJOR_MINOR} -Dscala.compat.version=${SCALA_MAJOR} > -DskipTests -Dmaven.javadoc.skip=true clean package > {code} > docker build . -t mahout-test > docker run -it mahout-test /bin/bash -- This message was sent by Atlassian Jira (v8.3.4#803005)