The issue was that SSH key generated on Spark Master was not transferred to
this new slave. Spark-ec2 script with `start` command omits this step. The
solution is to use `launch` command with `--resume` options. Then the SSH
key is transferred to the new slave and everything goes smooth.
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That's because you need to add the master's public key (~/.ssh/id_rsa.pub)
to the newly added slaves ~/.ssh/authorized_keys.
I add slaves this way:
- Launch a new instance by clicking on the slave instance and choose *launch
more like this *
*- *Once its launched, ssh into it and add the master p
