[RStudio] Dataproc connection is not esteblished by Livy

Ponder about EMR?

Preconditions:

1. Dataproc is created on RStudio

Steps to reproduce:

1. Click on Connections tab
2. Click on New connection
3. Livy is selected
4. Indicate your master IP (see attachment)
5. Click on Test button
6. Look at /var/log/livy on mater Dataproc

Actual result:

1. Error appears about livy session
2. There is an error in livy log

Expected result:

1. Error does not appear about livy session
2. There is not error in livy log