I have a set of data based on which I want to create a classification model. Each row has the following form: user1,class1,product1 user1,class1,product2 user1,class1,product5 user2,class1,product...

I'm trying to launch a standalone Spark cluster using its pre-packaged EC2 scripts, but it just indefinitely hangs in an 'ssh-ready' state: ubuntu@machine:~/spark-1.2.0-bin-hadoop2.4$ ./ec2/spark-...