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Using SQOOP over an SSH tunnel


We're trying to use an SSH tunnel on our edge node to run sqoop jobs from an external partner's Oracle database. We've been able to connect to the Oracle database using the SSH tunnel on the edge node successfully, but it seems all nodes in the cluster involved in the MR job need the tunnel as well?

Is there a way to have all connections from the cluster routed via the SSH tunnel on our edge node?
Hoping we don't need the SSH tunnel on every node in our cluster.