Spark Job Server中的Java程序引發scala.MatchError

我正在使用DSE Spark Job Server。我嘗試完成的任務如下：Spark Job Server中的Java程序引發scala.MatchError

我在Java中創建的Spark任務預計會從cassandra db中獲取一些數據，並將部署到DSE Analytics羣集中。

的代碼如下：

package com.symantec.nsp.analytics; 

import static com.datastax.spark.connector.japi.CassandraJavaUtil.javaFunctions; 
import static com.datastax.spark.connector.japi.CassandraJavaUtil.mapRowTo; 

import java.io.Serializable; 
import java.util.List; 
import java.util.UUID; 

import org.apache.commons.lang.StringUtils; 
import org.apache.spark.SparkContext; 
import org.apache.spark.api.java.JavaSparkContext; 

import spark.jobserver.JavaSparkJob; 
import spark.jobserver.SparkJobInvalid; 
import spark.jobserver.SparkJobValid$; 
import spark.jobserver.SparkJobValidation; 

import com.symantec.nsp.analytics.model.Bucket; 
import com.typesafe.config.Config; 

public class JavaSparkJobBasicQuery extends JavaSparkJob { 

    public String runJob(JavaSparkContext jsc, Config config) { 
     try { 
      List<UUID> bucketRecords = javaFunctions(jsc).cassandraTable("nsp_storage", "bucket", mapRowTo(Bucket.class)) 
        .select("id", "deleted").filter(s -> s.getDeleted()).map(s -> s.getId()).collect(); 

      System.out.println(">>>>>>>> Total Buckets getting scanned by Spark :" + bucketRecords.size()); 
      return bucketRecords.toString(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
      return null; 
     } 
    } 

    public SparkJobValidation validate(SparkContext sc, Config config) { 
     return null; 
    } 

    public String invalidate(JavaSparkContext jsc, Config config) { 
     return null; 
    } 
}

問題：

在行使這個代碼我得到了下面的問題：

"status": "ERROR", 
    "result": 
    "message": "null", 
    "errorClass": "scala.MatchError", 
    "stack": ["spark.jobserver.JobManagerActor$$anonfun$spark$jobserver$JobManagerActor$$getJobFuture$4.apply(JobManagerActor.scala:244)", "scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)", "scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)", "java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)", "java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)", "java.lang.Thread.run(Thread.java:745)"]

有人能解決這個問題。注意：我試過多次清洗/tmp文件夾。無法解決這個問題。我使用的DSE版本是4.8.10。

來源

2016-10-21 Krishna Aiyamperumal