Description of problem: As of FC22 I can no longer mount my Solaris 10 NFS servers from Fedora using the default mount options. The Solaris NFS server complains of: Oct 5 23:54:41 palms nfssrv: [ID 474727 kern.notice] NOTICE: Failed to decode arguments for NFS version 4 procedure RFS4_COMPOUND client hostname.domain (192.168.41.186) This worked fine in FC21 and prior. Version-Release number of selected component (if applicable): kernel-4.1.6-100.fc21.x86_64 and prior works fine kernel-4.1.6-201.fc22.x86_64 and later doesn't How reproducible: 100% Steps to Reproduce: 1. palais# mount -r palms:/app/01/kick /x 2. 3. Actual results: mount.nfs: access denied by server while mounting palms:/app/01/kick palms has this in the kernel log: Oct 6 06:20:37 palms nfssrv: [ID 474727 kern.notice] NOTICE: Failed to decode arguments for NFS version 4 procedure RFS4_COMPOUND client palais.domain (192.168.41.191) Expected results: success Additional info: Workaround is to use -vers=3 option, which works fine. tcpdump of fc22 attempt shows the request that is failing has opcode EXCHANGE_ID on fc21, the first op sent is SETCLIENTID, which gets a SETCLIENTID_CONFIRM response.
See bz 1226387 for workarounds (or, if they don't work, reopen this bug so we can verify that this really is a dup). Also, the bug is on the Solaris side, so if you have some way to lean on them to release the fix, please do. *** This bug has been marked as a duplicate of bug 1226387 ***