Sorry I was unable to reply for couple of days.
I checked the error again and can’t see any other initial cause. Here is the
full error that is coming.
Exception in thread "main" java.lang.NoClassDefFoundError:
com/datastax/spark/connector/mapper/ColumnMapper
at ldCassandraTable.main(ld_Cassandra_tbl_Job.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:329)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:75)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException:
com.datastax.spark.connector.mapper.ColumnMapper
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
From: Dave Brosius [mailto:[email protected]]
Sent: Tuesday, March 31, 2015 8:46 PM
To: [email protected]
Subject: Re: Getting NoClassDefFoundError for
com/datastax/spark/connector/mapper/ColumnMapper
Is there an 'initial cause' listed under that exception you gave? As
NoClassDefFoundError is not exactly the same as ClassNotFoundException. It
meant that ColumnMapper couldn't initialize it's static initializer, it could
be because some other class couldn't be found, or it could be some other non
classloader related error.
On 2015-03-31 10:42, Tiwari, Tarun wrote:
Hi Experts,
I am getting java.lang.NoClassDefFoundError:
com/datastax/spark/connector/mapper/ColumnMapper while running a app to load
data to Cassandra table using the datastax spark connector
Is there something else I need to import in the program or dependencies?
RUNTIME ERROR: Exception in thread "main" java.lang.NoClassDefFoundError:
com/datastax/spark/connector/mapper/ColumnMapper
at ldCassandraTable.main(ld_Cassandra_tbl_Job.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Below is my scala program
/*** ld_Cassandra_Table.scala ***/
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.spark.SparkConf
import com.datastax.spark.connector
import com.datastax.spark.connector._
object ldCassandraTable {
def main(args: Array[String]) {
val fileName = args(0)
val tblName = args(1)
val conf = new SparkConf(true).set("spark.cassandra.connection.host",
"<MASTER HOST>") .setMaster("<MASTER URL>") .setAppName("LoadCassandraTableApp")
val sc = new SparkContext(conf)
sc.addJar("/home/analytics/Installers/spark-cassandra-connector-1.1.1/spark-cassandra-connector/target/scala-2.10/spark-cassandra-connector-assembly-1.1.1.jar")
val normalfill = sc.textFile(fileName).map(line => line.split('|'))
normalfill.map(line => (line(0), line(1), line(2), line(3), line(4), line(5),
line(6), line(7), line(8), line(9), line(10), line(11), line(12), line(13),
line(14), line(15), line(16), line(17), line(18), line(19), line(20),
line(21))).saveToCassandra(keyspace, tblName, SomeColumns("wfctotalid",
"timesheetitemid", "employeeid", "durationsecsqty", "wageamt", "moneyamt",
"applydtm", "laboracctid", "paycodeid", "startdtm", "stimezoneid",
"adjstartdtm", "adjapplydtm", "enddtm", "homeaccountsw", "notpaidsw",
"wfcjoborgid", "unapprovedsw", "durationdaysqty", "updatedtm",
"totaledversion", "acctapprovalnum"))
println("Records Loaded to ".format(tblName))
Thread.sleep(500)
sc.stop()
}
}
Below is the sbt file:
name:= “POC”
version := "0.0.1"
scalaVersion := "2.10.4"
// additional libraries
libraryDependencies ++= Seq(
"org.apache.spark" %% "spark-core" % "1.1.1" % "provided",
"org.apache.spark" %% "spark-sql" % "1.1.1" % "provided",
"com.datastax.spark" %% "spark-cassandra-connector" % "1.1.1" % "provided"
)
Regards,
Tarun Tiwari | Workforce Analytics-ETL | Kronos India
M: +91 9540 28 27 77 | Tel: +91 120 4015200
Kronos | Time & Attendance • Scheduling • Absence Management • HR & Payroll •
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