Spark: java.lang.ClassCastException org.elasticsearch.spark.sql.EsDataFrameWriter to field org.elasticsearch.spark.sql.EsSparkSQL

Elastic Stack Elasticsearch
1

Running es4Hadoop 2.4.4 with Spark 1.6.0, Java 1.8, when:

JavaEsSparkSQL.saveToEs(DATA_FRAME, "consolidation-v2/items");

(where DATA_FRAME is coming from a Parquet file).

I got the exception:

Caused by: java.lang.ClassCastException: cannot assign instance of org.elasticsearch.spark.sql.EsDataFrameWriter to field org.elasticsearch.spark.sql.EsSparkSQL$$anonfun$saveToEs$1.eta$0$1$1 of type org.elasticsearch.spark.sql.EsSchemaRDDWriter in instance of org.elasticsearch.spark.sql.EsSparkSQL$$anonfun$saveToEs$1
	at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2089)
	at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1261)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2006)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1924)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2000)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1924)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
	at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:76)
	at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:115)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61)
	at org.apache.spark.scheduler.Task.run(Task.scala:89)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

But doing the same thing via spark-shell is working fine :confused:

2

That's fairly peculiar. Can you double check which versions of ES-Spark are getting picked up? I'm wondering if there's a mismatch of versions on your driver versus what is running on the cluster... EsSchemaRDDWriter is only in the spark 1.2 compatibility distribution. EsDataFrameWriter is used in spark 1.3 and up.

3

Ya it sounds something like a mix between compile & run time.

Now I include the es4Hadoop at build time (see https://medium.com/@thomasdecaux/setup-elasticsearch-hadoop-plugin-for-apache-spark-2b6f7a75f77d) and no more trouble.

Thanks you,

4

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