Docker for AWS 18.06.1-ce-aws1, EFS timeout for editing (vi)

General
1

Expected behavior

Successfully able to edit files in EFS folders

Actual behavior

EFS mounted file can be seen, but when edit using an editor (e.g. vim), it getting stucked.
In kernel log, it says NFS server time out.

Additional Information

Used standard EFS mount options provided by AWS to mount EFS
Following logs can be seen in kern.log

kern.log:Feb 11 00:09:53 ip-172-21-0-171 kernel: nfs: server fs-6bf47b52.efs.ap-southeast-2.amazonaws.com not responding, still trying
kern.log:Feb 11 00:10:34 ip-172-21-0-171 kernel:  [<ffffffffb22bcf98>] ? nfs_file_fsync+0x54/0x187
kern.log:Feb 11 00:12:37 ip-172-21-0-171 kernel:  [<ffffffffb22bcf98>] ? nfs_file_fsync+0x54/0x187
kern.log:Feb 11 00:13:39 ip-172-21-0-171 kernel: nfs: server fs-6bf47b52.efs.ap-southeast-2.amazonaws.com not responding, timed out
kern.log:Feb 11 00:13:40 ip-172-21-0-171 kernel: nfs: server fs-6bf47b52.efs.ap-southeast-2.amazonaws.com not responding, timed out
kern.log:Feb 11 00:14:40 ip-172-21-0-171 kernel:  [<ffffffffb22bcf98>] ? nfs_file_fsync+0x54/0x187

Steps to reproduce the behavior

  1. deploy the stack using https://editions-us-east-1.s3.amazonaws.com/aws/stable/Docker.tmpl ( Need EFS cloudstor plugin enabled)
  2. Attach a cloudstor EFS share and edit a file in the directory