We ran into issues using EFS (which under the covers is a NFS like filesystem)... details are in this post
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/External-checkpoints-not-getting-cleaned-up-discarded-potentially-causing-high-load-tp14073p14106.html -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
