same behavior has been reproduced in Ubuntu 20, kernel 5.11.0-10-19-aws -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-aws-5.4 in Ubuntu. https://bugs.launchpad.net/bugs/1946032
Title: NFS client fails to mount with timeout on kernel 5.4.0-1057-aws Status in linux-aws-5.4 package in Ubuntu: Confirmed Bug description: On an Ubuntu 18.04.1 server, I mount AWS EFS filesystems with nfsv4.1 successfully on ec2 instances. Mounts work on kernel version 5.4.0-1056-aws but if i upgrade the kernel to 5.4.0-1057-aws the mounts stop working with a network timeout, due to port 111 being blocked as its not needed for nfsv4 Issue started to happen when apt daily automatically upgraded the kernel version. I reproduced by rolling back kernel version on the same instance and doing mounts successfully, then reverting to newer kernel (plus reboot) and getting the network timeout issue. Mount command is identical in all cases and follows AWS Documentation ``` sudo mount -t nfs -o nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,noresvport mount-target-DNS:/ ~/efs-mount-point ``` Could it be a kernel bug or misconfiguration, what can i do ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws-5.4/+bug/1946032/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
