*@Sasi*
You should be able to create a job something like this:
package io.radtech.spark.jobserver
import java.util.UUID
import org.apache.spark.{ SparkConf, SparkContext }
import org.apache.spark.rdd.RDD
import org.joda.time.DateTime
import com.datastax.spark.connector.types.TypeConverter
import com.datastax.spark.connector.types.TypeConversionException
import com.typesafe.config.Config
case class AnalyticReport(
deviceId: UUID,
reportType: String,
timestamp: DateTime,
data: Map[String, String])
class ReadWriteCassandraJob {
}
trait AlycsReportSparkJob extends spark.jobserver.SparkJob with
spark.jobserver.NamedRddSupport {
val rddName = "report"
// Validation is not really needed in this example
def validate(sc: SparkContext, config: Config):
spark.jobserver.SparkJobValidation = spark.jobserver.SparkJobValid
}
object ReadWriteCassandraJob extends AlycsReportSparkJob {
val cassandraHost = "127.0.0.1"
val keyspace = "test"
val table = "alycs_reports_by_device"
/*
* Enable Cassandra-specific functions on the `SparkContext` and `RDD`:
*/
import com.datastax.spark.connector._
/*
* Before creating the `SparkContext`, set the
`spark.cassandra.connection.host`
* property to the address of one of the Cassandra nodes.
*/
val conf = new SparkConf(true).set("spark.cassandra.connection.host",
cassandraHost)
/*
* Set the port to connect to. If using embedded instance set to 9142
else
* default to 9042.
*/
conf.set("spark.cassandra.connection.native.port", "9042")
override def runJob(sc: SparkContext, config: Config) = {
// Read table test.alycs_reports_by_device and print its contents:
val rdd = sc.cassandraTable(keyspace, table).select(
"device_id", "report_type", "time", "data")
rdd.collect().foreach(println)
val rddrows = rdd.map(r =>
AnalyticReport(UUID.fromString(r.getUUID("device_id").toString()),
r.getString("report_type"),
new org.joda.time.DateTime(r.getDate("time")),
r.getMap[String, String]("data")))
rddrows.collect.foreach(println)
}
}
Then create a custom spark context file,
src/main/resources/spark.context-settings.config, for the job; note the
versions of the jars are incorrect below, don't have the latest ones off
the top of my head. If you are using the uber / fat jar from
spark-cassandra-connector then simple place that here instead, i believe
the name is: spark-cassandra-connector-assembly-1.1.0.jar.
spark.context-settings {
spark.cores.max = 4
spark.cassandra.connection.host 127.0.0.1
dependent-jar-uris = [
"local://sparkshell-lib/spark-cassandra-connector_2.10-1.0.0-rc4.jar",
"local://sparkshell-lib/cassandra-clientutil-2.0.9.jar",
"local://sparkshell-lib/cassandra-thrift-2.0.9.jar",
"local://sparkshell-lib/cassandra-driver-core-2.0.4.jar",
"local://sparkshell-lib/guava-15.0.jar",
"local://sparkshell-lib/libthrift-0.9.1.jar",
"local://sparkshell-lib/joda-convert-1.2.jar",
"local://sparkshell-lib/joda-time-2.3.jar"
]
}
Now post the context to the job server:
radtech:spark-jobserver-example$ curl -d
src/main/resources/spark.context-settings.config -X POST
'localhost:8090/contexts/cassJob-context'
Then execute your job:
curl --data-binary
@target/scala-2.10/spark-jobserver-example_2.10-0.1.0.jar
localhost:8090/jars/cassjob
curl -X POST
'localhost:8090/jobs?appName=cassjob&classPath=io.radtech.spark.jobserver.ReadWriteCassandraJob&context=cassJob-context'
Worse case you should be able to set these in your spark-defatul.conf to a
location that is common to all your executors:
spark.executor.extraClassPath=.....
HTH.
-Todd
On Tue, Jan 6, 2015 at 10:00 AM, bchazalet <bchaza...@companywatch.net>
wrote:
> It does not look like you're supposed to fiddle with the SparkConf and even
> SparkContext in a 'job' (again, I don't know much about jobserver), as
> you're given a SparkContext as parameter in the build method.
>
> I guess jobserver initialises the SparkConf and SparkContext itself when it
> first starts, meanwhile you're actually creating a new one within your job,
> which the github example you mentionned doesn't do, it just uses the
> context
> given as parameter:
>
> def build(sc: SparkContext): RDD[(Reputation, User)] = {
> sc.textFile(inputPath).
> map(User.fromRow).
> collect {
> case Some(user) => user.reputation -> user
> }.
> sortByKey(ascending = false)
> }
>
> I am not sure either how you upload your job's jar to the server (the curl
> command you posted does not seem to do so).
>
> Maybe you could try first to make it work on its own as a regular spark
> app,
> without using jobserver.
>
>
>
>
> --
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