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From "liyunzhang_intel (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-4903) Avoid add all spark dependency jars to SPARK_YARN_DIST_FILES and SPARK_DIST_CLASSPATH
Date Wed, 25 May 2016 08:26:12 GMT

    [ https://issues.apache.org/jira/browse/PIG-4903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15299670#comment-15299670
] 

liyunzhang_intel commented on PIG-4903:
---------------------------------------

[~xuefuz] and  [~sriksun]:  As before you worked on PIG-4667, can you help view this jira?


> Avoid add all spark dependency jars to  SPARK_YARN_DIST_FILES and SPARK_DIST_CLASSPATH
> --------------------------------------------------------------------------------------
>
>                 Key: PIG-4903
>                 URL: https://issues.apache.org/jira/browse/PIG-4903
>             Project: Pig
>          Issue Type: Sub-task
>          Components: spark
>            Reporter: liyunzhang_intel
>
> There are some comments about bin/pig on https://reviews.apache.org/r/45667/#comment198955.
> {code}
> ################# ADDING SPARK DEPENDENCIES ##################
> # Spark typically works with a single assembly file. However this
> # assembly isn't available as a artifact to pull in via ivy.
> # To work around this short coming, we add all the jars barring
> # spark-yarn to DIST through dist-files and then add them to classpath
> # of the executors through an independent env variable. The reason
> # for excluding spark-yarn is because spark-yarn is already being added
> # by the spark-yarn-client via jarOf(Client.Class)
> for f in $PIG_HOME/lib/*.jar; do
>     if [[ $f == $PIG_HOME/lib/spark-assembly* ]]; then
>         # Exclude spark-assembly.jar from shipped jars, but retain in classpath
>         SPARK_JARS=${SPARK_JARS}:$f;
>     else
>         SPARK_JARS=${SPARK_JARS}:$f;
>         SPARK_YARN_DIST_FILES=${SPARK_YARN_DIST_FILES},file://$f;
>         SPARK_DIST_CLASSPATH=${SPARK_DIST_CLASSPATH}:\${PWD}/`basename $f`
>     fi
> done
> CLASSPATH=${CLASSPATH}:${SPARK_JARS}
> export SPARK_YARN_DIST_FILES=`echo ${SPARK_YARN_DIST_FILES} | sed 's/^,//g'`
> export SPARK_JARS=${SPARK_YARN_DIST_FILES}
> export SPARK_DIST_CLASSPATH
> {code}
> Here we first copy all spark dependency jar like spark-network-shuffle_2.10-1.6.1 jar
to distcache(SPARK_YARN_DIST_FILES) then add them to the classpath of executor(SPARK_DIST_CLASSPATH).
Actually we need not copy all these depency jar to SPARK_DIST_CLASSPATH because all these
dependency jars are included in spark-assembly.jar and spark-assembly.jar is uploaded with
the spark job.



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