小编use*_*226的帖子

我正在使用elasticsearch中加载的一些测试数据在本地计算机上测试ElasticSearch和Spark集成.

val sparkConf = new SparkConf().setAppName("Test").setMaster("local")
val sc = new SparkContext(sparkConf)
val conf = new JobConf()
conf.set("spark.serializer", classOf[KryoSerializer].getName)
conf.set("es.nodes", "localhost:9200")
conf.set("es.resource", "bank/account")
conf.set("es.query", "?q=firstname:Daniel")

val esRDD = sc.hadoopRDD(conf,classOf[EsInputFormat[Text, MapWritable]],
      classOf[Text], classOf[MapWritable])
esRDD.first()
esRDD.collect()

代码运行正常并使用esRDD.first()成功返回正确的结果

但是,esRDD.collect()将生成异常:

java.io.NotSerializableException: org.apache.hadoop.io.Text
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
    at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1378)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
    at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:42)
    at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:71)
    at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:193)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

我相信这与这里提到的问题有关http://www.elasticsearch.org/guide/en/elasticsearch/hadoop/current/spark.html 所以我相应地添加了这一行

conf.set("spark.serializer", classOf[KryoSerializer].getName)

我应该做些什么来让它发挥作用吗？谢谢

更新:序列化设置问题已解决.通过使用

sparkConf.set("spark.serializer", classOf[KryoSerializer].getName)

代替

conf.set("spark.serializer", classOf[KryoSerializer].getName)

现在还有另一个此数据集中有1000条不同的记录

esRDD.count()

但是,返回1000没问题 …