Going through the logs, not quote sure what is causing these errors - attempted a google search but didn't come up with anything about it (suppose it's a tricky search)
Code:
Jan 31 08:55:57 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (11)
Jan 31 08:56:04 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (12)
Jan 31 08:56:04 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (4)
Jan 31 08:56:04 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (11)
Jan 31 08:56:05 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (13)
Jan 31 08:56:09 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (14)
Jan 31 08:56:10 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (15)
Jan 31 08:56:10 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (4)
Jan 31 08:56:10 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (11)
Jan 31 08:56:10 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (12)
Jan 31 08:56:11 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (13)
Jan 31 08:56:19 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (14)
Jan 31 08:56:19 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (6), releasing oldest (15)
Jan 31 08:56:22 batcavefs /usr/lib/nfs/nfsd[631]: [ID 696744 daemon.warning] too many connections (5), releasing oldest (4)