On Mon, 2021-03-08 at 13:16 -0500, Jason Breitman wrote: > Issue > NFSv4 mounts periodically hang on the NFS Client. > > During this time, it is possible to manually mount from another NFS > Server on the NFS Client having issues. > Also, other NFS Clients are successfully mounting from the NFS Server > in question. > Rebooting the NFS Client appears to be the only solution. > > I believe this issue has been discussed in the past so I included an > article that matched my symptoms. > I do not see a case statement for FIN_WAIT2 at > https://elixir.bootlin.com/linux/v4.19.171/source/net/sunrpc/xprtsock.c > . > > NFS Client > OS: Debian Buster 10.8 > Kernel: 4.19.171-2 > Protocol: NFSv4 with Kerberos Security > Mount Options: nfs- > server.domain.com:/data /mnt/data nfs4 lookupcache=pos,n > oresvport,sec=krb5,hard,rsize=1048576,wsize=1048576 00 > > Output from the NFS Client when the issue occurs > # netstat -an | grep NFS.Server.IP.X > tcp 0 0 NFS.Client.IP.X:46896 > NFS.Server.IP.X:2049 FIN_WAIT2 > Your client has closed the connection, and is waiting for the server to close the connection on its side. I'd suggest using a newer kernel, or else getting someone in the Debian project to fix theirs. -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
