# Structured Streaming - "Failed to find data source: es"

**URL:** <https://discuss.elastic.co/t/structured-streaming-failed-to-find-data-source-es/112144>\
**Category:** Elasticsearch\
**Tags:** es-hadoop\
**Created:** [December 18, 2017, 4:09am UTC](https://discuss.elastic.co/t/structured-streaming-failed-to-find-data-source-es/112144 "2017-12-18T04:09:18Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![polomarcus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/polomarcus/32/25733_2.png) [@polomarcus](https://discuss.elastic.co/u/polomarcus)\
**Post date:** [December 19, 2017, 12:33am UTC](https://discuss.elastic.co/t/structured-streaming-failed-to-find-data-source-es/112144/3 "2017-12-19T00:33:01Z")

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Thanks for the quick answer.

```auto
java.lang.ClassNotFoundException: Failed to find data source: es. Please find packages at http://spark.apache.org/third-party-projects.html
	at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:549)
	at org.apache.spark.sql.execution.datasources.DataSource.providingClass$lzycompute(DataSource.scala:86)
	at org.apache.spark.sql.execution.datasources.DataSource.providingClass(DataSource.scala:86)
	at org.apache.spark.sql.execution.datasources.DataSource.createSink(DataSource.scala:270)
	at org.apache.spark.sql.streaming.DataStreamWriter.start(DataStreamWriter.scala:286)
	at org.apache.spark.sql.streaming.DataStreamWriter.start(DataStreamWriter.scala:222)
	at elastic.ElasticSink$.writeStream(ElasticSink.scala:19)
	at main.Main$.main(Main.scala:24)
	at main.Main.main(Main.scala)
	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)
Caused by: java.lang.ClassNotFoundException: es.DefaultSource
	at java.lang.ClassLoader.findClass(ClassLoader.java:530)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

```

With this version used : `libraryDependencies += "org.elasticsearch" % "elasticsearch-hadoop" % "6.1.0"`

Just to be sure, what should be the imported class when we define our query ?

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_[View the full topic](https://discuss.elastic.co/t/structured-streaming-failed-to-find-data-source-es/112144)._