# Set Spark home variable

If you are using the Spark client from the Cloudera or Hortonworks Hadoop distributions, you may also receive the following log error:

```
Exception in thread "main" java.lang.NoSuchFieldError: TOKEN_KIND

```

If you received this log error, you must also complete the following steps for your Hadoop distribution:

1. Download the Spark client for your Hadoop cluster distribution (Cloudera or Hortonworks).
2. Navigate to the `adaptive-execution/config` directory and open the `application.properties` file.
3. Set the **sparkHome** location to where Spark 2 is located on your machine.

Example for Cloudera:

```
**sparkhome** = /opt/cloudera/parcels/SPARK2/lib/spark2

```

Example for Hortonworks:

```
**sparkhome** =/opt/horton/SPARK2/lib/spark2
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pentaho.com/install/9.3-install/pentaho-configuration/tasks-to-be-performed-by-an-it-administrator/set-up-the-adaptive-execution-layer-ael/troubleshooting-ael-cp/hadoop-libraries-are-missing/set-spark-home-variable.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.