When starting up an Amazon ECS task with launch type FARGATE it fails with the following reason:

ResourceInitializationError: failed to invoke EFS utils commands to set up EFS volumes: command failed with 32: failed to execute command to invoke EFS utils: mount.nfs4:

Connection timed out

The fargate task is a docker image that needs to mount EFS as persistent storage.

Why is the connection timing out?

  • 1
    Could you please provide some more context to this? There doesn't seem to be a question asked either. Commented Apr 29, 2020 at 11:24
  • Thank you for the feedback. Edited with a proper question and a bit more context. Are there more improvements I could make?
    – stoft
    Commented May 1, 2020 at 11:38

1 Answer 1


Underlying reason:

The ECS service's network access security group did not have permission to access EFS.


Add an inbound rule for type NFS in the security group as described in this tutorial: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/tutorial-efs-volumes.html#efs-security-group

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