Elasticsearch-hadoop Scala version update to 2.12

[Liana09]

Issue Description:
I hope I am addressing this topic in the right place.
I am trying to connect to an elasticsearch database using spark and my code snippet looks like this:

spark = SparkSession.builder.master("local").appName("Spark").getOrCreate()
reader = spark.read.format("org.elasticsearch.spark.sql").option("es.read.metadata", "true").option("es.nodes.wan.only","true").option("es.port","9200").option("es.net.ssl","false").option("es.nodes", "here-ip-adress")
df = reader.load("my_index")

When calling df = reader.load("my_index") I get the following error:

py4j.protocol.Py4JJavaError: An error occurred while calling o45.load.: java.lang.NoClassDefFoundError: scala/Product$class
    at org.elasticsearch.spark.sql.ElasticsearchRelation.<init>(DefaultSource.scala:191)
    at org.elasticsearch.spark.sql.DefaultSource.createRelation(DefaultSource.scala:93)
    at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:350)
    at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:274)
    at org.apache.spark.sql.DataFrameReader.$anonfun$load$3(DataFrameReader.scala:245)
    at scala.Option.getOrElse(Option.scala:189)
    at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:245)
    at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:188)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
    at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
    at py4j.Gateway.invoke(Gateway.java:282)
    at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
    at py4j.commands.CallCommand.execute(CallCommand.java:79)
    at py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
    at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
    at java.lang.Thread.run(Thread.java:748)

Caused by: java.lang.ClassNotFoundException: scala.Product$class
        at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        ... 20 more

The error is caused, because the elasticsearch-hadoop connector still uses Scala Version 2.11, while Spark/Pyspark >=3.0 uses Scala version 2.12. For this reason, I am no longer able to use elasticsearch-hadoop to connect to my elasticsearch database, as I have different Scala Versions.

This problem would be solved, if I would downgrade to spark version <3.0, however I cannot do this, because it will generate other issues.

When will elasticsearch-hadoop support Scala 2.12? Or are there other workarounds to solve this kind of dependency issues?

Version Info

OS: : Fedora
JVM : openjdk 11.0.14.1
Hadoop/Spark: 3.2.1
ES-Hadoop : 8.1.2

Thank you!

[Liana09]

Just realized I can use elasticsearch-spark package from here to solve this issue:
https://search.maven.org/artifact/org.elasticsearch/elasticsearch-spark-30_2.12/7.17.2/jar

[abhishekmiet08]

Thanks @Liana09, it helped me to resolve the same blocker.