EMR clusters may fail to download bootstrap actions if the S3 bucket is in a different AWS region than the cluster.
If using automation like Terraform, parameters for the bootstrap action might be in the wrong order, causing EMR to try and download a directory instead of a file. Troubleshooting Steps EMR clusters may fail to download bootstrap actions
This error typically occurs when an Amazon EMR cluster fails to launch because the primary (master) node cannot retrieve a required script or configuration file from Amazon S3. In EMR, bootstrap actions are numbered based on their order; "bootstrap action 2" indicates the second script in your list failed. Common Causes In EMR, bootstrap actions are numbered based on
The master instance may lack a route to S3, especially in a private subnet without an S3 VPC Endpoint or NAT Gateway. EMR clusters may fail to download bootstrap actions
