Comment 0 for bug 1509666

I am running ubuntu server 64 bit 14.04 on my home server.
The server shares some directories using NFS v4

I have some apple macs (MBAs) that use the automount to mount the shared nfs directory. Previously, this had worked fine.
My file /etc/auto_nfs contains the single line:
/../Volumes/share -fstype=nfs,noresvport nfs://serv2_local:/export/share

I updated to kernel 3.13.0-66 and the OSX machines would no long mount the NFS shares (see message below from /var/log/messages.log on the Mac):

Oct 24 14:34:35 beethoven automountd[655]: NFS server serv2_local not responding

Please see the list of modules loaded:
Oct 24 14:26:36 serv2 kernel: [ 36.402674] Modules linked in: quota_v2 quota_tree nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt rc_dvbsky(OX) xt_tcpudp xt_recent iptable_filter ip_tables x_tables snd_hda_codec_realtek dvbsky_m88rs6000(OX) snd_hda_intel snd_hda_codec kvm_amd snd_hwdep smipcie(OX) dvb_core(OX) kvm snd_pcm rc_core(OX) snd_page_alloc snd_timer snd soundcore serio_raw i2c_piix4 edac_core edac_mce_amd k10temp shpchp mac_hid parport_pc ppdev lp parport pata_acpi hid_generic usbhid radeon hid i2c_algo_bit ttm drm_kms_helper pata_atiixp ahci libahci atl1c drm wmi

My other linux clients were able to mount the NFS share without difficulty. I have rolled the server back to the previous kernel (3.13.0-65-generic) and NFS works fine with the Macs. (Note that the problem exists with both my Macs, running OSX 10.10.5 and 10.11.1)