Spark 3 FAQs

Q: Can I install only one or two Spark versions?

A: Yes! You can install any combination of the three versions based on your requirements. Installation is independent and modular.

Q: Which Spark version should I use for new applications?

A: Spark 3.5.5 is recommended for all new applications. It provides the latest features, best performance, and will receive future updates.

Q: Can I upgrade an existing Spark installation to this multi-version setup?

A: Yes, but requires careful planning:

1. Install the new mpack
2. Add desired Spark versions
3. Migrate applications gradually
4. Decommission old installation when ready

Q: Do I need separate YARN queues for different Spark versions?

A: Not required, but recommended for:

• Resource isolation
• Capacity planning
• Cost allocation
• Performance monitoring

Q: How do I choose between Spark versions at runtime?

A: Use different spark-submit paths or set SPARK_HOME environment variable to the desired version's client directory.

Q: What happens to existing Spark applications after installing multiple versions?

A: Existing applications continue to work. You control which version each application uses by specifying the appropriate SPARK_HOME.

Q: Can different versions run on the same YARN cluster?

A: Yes! All versions submit jobs to the same YARN ResourceManager. YARN schedules containers regardless of Spark version.