Hi,
I am using the latest Cassandra-Spark Connector to access Cassandra tables
form Spark. While I successfully managed to connect Cassandra using
CassandraRDD, the similar SparkSQL approach does not work. Here is my code
for both methods:
import com.datastax.spark.connector._
import org.apache.spark.{SparkConf, SparkContext}
import org.apache.spark.sql._;
import org.apache.spark.SparkContext._
import org.apache.spark.sql.catalyst.expressions._
import com.datastax.spark.connector.cql.CassandraConnector
import org.apache.spark.sql.cassandra.CassandraSQLContext
val conf = new SparkConf().setAppName("SomethingElse")
.setMaster("local")
.set("spark.cassandra.connection.host", "localhost")
val sc: SparkContext = new SparkContext(conf)
val rdd = sc.cassandraTable("mydb", "mytable") // this works
But:
val cc = new CassandraSQLContext(sc)
cc.setKeyspace("mydb")
val srdd: SchemaRDD = cc.sql("select * from mydb.mytable ")
println ("count : " + srdd.count) // does not work
Exception is thrown:
Exception in thread "main"
com.google.common.util.concurrent.UncheckedExecutionException:
java.util.NoSuchElementException: key not found: mydb3.inverseeventtype
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2201)
at com.google.common.cache.LocalCache.get(LocalCache.java:3934)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3938)
....
in fact mydb3 is anothery keyspace which I did not tried even to connect to
it !
Any idea?
best,
/Shahab
Here is how my SBT looks like:
libraryDependencies ++= Seq(
"com.datastax.spark" %% "spark-cassandra-connector" % "1.1.0-beta1"
withSources() withJavadoc(),
"org.apache.cassandra" % "cassandra-all" % "2.0.9" intransitive(),
"org.apache.cassandra" % "cassandra-thrift" % "2.0.9" intransitive(),
"net.jpountz.lz4" % "lz4" % "1.2.0",
"org.apache.thrift" % "libthrift" % "0.9.1" exclude("org.slf4j", "slf4j-
api") exclude("javax.servlet", "servlet-api"),
"com.datastax.cassandra" % "cassandra-driver-core" % "2.0.4"
intransitive(),
"org.apache.spark" %% "spark-core" % "1.1.0" % "provided"
exclude("org.apache.hadoop", "hadoop-core"),
"org.apache.spark" %% "spark-streaming" % "1.1.0" % "provided",
"org.apache.hadoop" % "hadoop-client" % "1.0.4" % "provided",
"com.github.nscala-time" %% "nscala-time" % "1.0.0",
"org.scalatest" %% "scalatest" % "1.9.1" % "test",
"org.apache.spark" %% "spark-sql" % "1.1.0" % "provided",
"org.apache.spark" %% "spark-hive" % "1.1.0" % "provided",
"org.json4s" %% "json4s-jackson" % "3.2.5",
"junit" % "junit" % "4.8.1" % "test",
"org.slf4j" % "slf4j-api" % "1.7.7",
"org.slf4j" % "slf4j-simple" % "1.7.7",
"org.clapper" %% "grizzled-slf4j" % "1.0.2",
"log4j" % "log4j" % "1.2.17")
