You need to define the Service role and Job flow role in Amazon EMR before starting an Amazon EMR cluster.
Procedure
Follow the instructions in the Default IAM roles for Amazon EMR
documentation to define the roles. This will create the EMR_DefaultRole and the
EMR_EC2_DefaultRole that will be used to launch an Amazon EMR cluster from
Talend Studio.
From your AWS Management Console, navigate to the
Identity&Access Management service.
In the left menu, click Roles and check that your roles
have been successfully created.
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