Your app is named scala.HBaseApp
Does it read / write to HBase ?
Just curious.
On Sun, Oct 12, 2014 at 8:00 AM, Tao Xiao <xiaotao.cs....@gmail.com> wrote:
> Hi all,
>
> I'm using CDH 5.0.1 (Spark 0.9) and submitting a job in Spark Standalone
> Cluster mode.
>
> The job is quite simple as follows:
>
> object HBaseApp {
> def main(args:Array[String]) {
> testHBase("student", "/test/xt/saveRDD")
> }
>
>
> def testHBase(tableName: String, outFile:String) {
> val sparkConf = new SparkConf()
> .setAppName("-- Test HBase --")
> .set("spark.executor.memory", "2g")
> .set("spark.cores.max", "16")
>
> val sparkContext = new SparkContext(sparkConf)
>
> val rdd = sparkContext.parallelize(List(1,2,3,4,5,6,7,8,9,10), 3)
>
> val c = rdd.count // successful
> println("\n\n\n" + c + "\n\n\n")
>
> rdd.saveAsTextFile(outFile) // This line will throw
> "java.lang.ClassNotFoundException:
> com.xt.scala.HBaseApp$$anonfun$testHBase$1"
>
> println("\n down \n")
> }
> }
>
> I submitted this job using the following script:
>
> #!/bin/bash
>
> HBASE_CLASSPATH=$(hbase classpath)
> APP_JAR=/usr/games/spark/xt/SparkDemo-0.0.1-SNAPSHOT.jar
>
> SPARK_ASSEMBLY_JAR=/usr/games/spark/xt/spark-assembly_2.10-0.9.0-cdh5.0.1-hadoop2.3.0-cdh5.0.1.jar
> SPARK_MASTER=spark://b02.jsepc.com:7077
>
> CLASSPATH=$CLASSPATH:$APP_JAR:$SPARK_ASSEMBLY_JAR:$HBASE_CLASSPATH
> export SPARK_CLASSPATH=/usr/lib/hbase/lib/*
>
> CONFIG_OPTS="-Dspark.master=$SPARK_MASTER"
>
> java -cp $CLASSPATH $CONFIG_OPTS com.xt.scala.HBaseApp $@
>
> After I submitted the job, the count of rdd could be computed
> successfully, but that rdd could not be saved into HDFS and the following
> exception was thrown:
>
> 14/10/11 16:09:33 WARN scheduler.TaskSetManager: Loss was due to
> java.lang.ClassNotFoundException
> java.lang.ClassNotFoundException:
> com.xt.scala.HBaseApp$$anonfun$testHBase$1
> 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)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:270)
> at
> org.apache.spark.serializer.JavaDeserializationStream$$anon$1.resolveClass(JavaSerializer.scala:37)
> at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612)
> at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at scala.collection.immutable.$colon$colon.readObject(List.scala:362)
> 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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at
> org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40)
> at
> org.apache.spark.scheduler.ResultTask$.deserializeInfo(ResultTask.scala:63)
> at
> org.apache.spark.scheduler.ResultTask.readExternal(ResultTask.scala:139)
> at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1837)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
> at
> org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40)
> at
> org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:62)
> at
> org.apache.spark.executor.Executor$TaskRunner$$anonfun$run$1.apply$mcV$sp(Executor.scala:195)
> at
> org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:42)
> at
> org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:41)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> at
> org.apache.spark.deploy.SparkHadoopUtil.runAsUser(SparkHadoopUtil.scala:41)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:178)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
>
>
>
> I also noted that, if I add "-Dspark.jars=$APP_JAR" to the variable
> *CONFIG_OPTS*, i.e., CONFIG_OPTS="-Dspark.master=$SPARK_MASTER
> Dspark.jars=$APP_JAR", the job will finish successfully and rdd can be
> written into HDFS.
> So, what does "java.lang.ClassNotFoundException:
> com.xt.scala.HBaseApp$$anonfun$testHBase$1" mean and why would it be
> thrown ?
>
> Thanks
>
>
