Comment 3 for bug 1358226

I keep seeing this as well, my use case is a mail server (dovecot). It always seems to happen for less than a second, the times don't seem predictable and two 14.04 servers accessing the same share report the issues and different times, so I'm not sure it's really related to the remote end.

I am also getting locking issues with dovecot that seem to always appear about 90-120 seconds after this appears in syslog

Aug 21 06:48:55 mail-01 kernel: [2909938.530590] lockd: server 10.10.10.232 not responding, still trying
Aug 21 06:48:55 mail-01 kernel: [2909938.531290] lockd: server 10.10.10.232 OK
... [snip] ....
Aug 21 08:17:11 mail-01 kernel: [2915231.997469] lockd: server 10.10.10.232 not responding, still trying
Aug 21 08:17:11 mail-01 kernel: [2915231.998316] lockd: server 10.10.10.232 OK
Aug 21 08:31:04 mail-01 kernel: [2916064.970993] lockd: server 10.10.10.232 not responding, still trying
Aug 21 08:31:04 mail-01 kernel: [2916064.980768] lockd: server 10.10.10.232 OK
Aug 21 08:41:31 mail-01 kernel: [2916691.595302] lockd: server 10.10.10.232 not responding, still trying
Aug 21 08:41:31 mail-01 kernel: [2916691.596268] lockd: server 10.10.10.232 OK
Aug 21 08:50:25 mail-01 kernel: [2917224.586795] lockd: server 10.10.10.232 not responding, still trying
Aug 21 08:50:25 mail-01 kernel: [2917224.587609] lockd: server 10.10.10.232 OK

Aug 21 06:50:52 mail-01 dovecot: lmtp(18603, <email address hidden>): Error: Timeout (29s) while waiting for lock for transaction log file /srv/mail/domains/w/webinabox.net.au/lvstest/Maildir/dovecot.index.log
Aug 21 08:42:11 mail-01 dovecot: lmtp(14261, <email address hidden>): Error: Timeout (29s) while waiting for lock for transaction log file /srv/mail/domains/w/webinabox.net.au/lvstest/Maildir/dovecot.index.log